There are no values of x that satisfy the equation f(x) = 0.
what is a function?
A function is a mathematical concept that relates a set of inputs (known as the domain) to a set of outputs (known as the range), such that every input corresponds to exactly one output.
In other words, a function is a rule that assigns each element of the domain to a unique element of the range.
We are given that the mapping f(x) = x² + 1, and that the range of f is R - {2, 5, 10}.
To determine the domain of f, we need to consider what values of x will result in a valid output for f(x). Since f(x) is defined as x² + 1, we know that f(x) will always be greater than or equal to 1. Therefore, the domain of f is all real numbers, or D = R.
To find f⁻¹(5), we need to solve for x when f(x) = 5. That is, we need to solve the equation x² + 1 = 5. Rearranging, we get x² = 4, so x = ±2. Therefore, f⁻¹(5) = {-2, 2}.
Finally, to find the values of x when f(x) = 0, we need to solve the equation x² + 1 = 0. However, this equation has no real solutions, since the square of a real number is always non-negative.
Therefore, there are no values of x that satisfy the equation f(x) = 0.
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6 ft
Find the area.
8 ft
8 ft
Remember: A = πr²
A = [?] ft²
Round to the nearest
hundredth.
Use 3.14 for T.
The area of the figure is the collective sum of area of the square, rectangle and semi-circle which is 100.56 squared feet.
What is the area of the figureTo find the area of the figure, we need to find the area of the square, semi-circle and triangle.
A = Area of square + area of triangle + area of semi-circle
A = L² + 1/2(bh) + πr
A = 8² + 1/2(6 * 8) + 3.14(4)
A = 64 + 24 + 12.56
A = 100.56 ft²
The area of the figure is 100.56ft²
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I need help please show your work
Answer:
The 2nd equation is false.
Step-by-step explanation:
You don't even have to solve. DE is not 58, it's 40.
The 2nd equation is false.
When finding the nth roots of a complex number, the exact values of these roots will be given in rectangular form, and the approximate values of these roots will be given in • form Find the cube roots of 117 441 Your answers should be in rectangular form, with all numbers rounded to the nearest hundredths. Select one or more! O a 3.00 +4.002 O b. –4.96 +0.604 OC -1.96 + 1.964 O d. - 124.10 + 11.95 e. 3.00 4.00 Of 4.68 - 1.764 Og 1.96 4.602 O h. 75.00+ 100.00 Di 49.10 - 114.951
The cube roots of 117 441 in rectangular form are: a. 3.00 +4.002, b. –4.96 +0.604, c. -1.96 + 1.964, d. - 124.10 + 11.95, e. 3.00 4.00, f. 4.68 - 1.764, g. 1.96 4.602, and h. 75.00+ 100.00.
To find the nth roots of a complex number, the exact values are given in rectangular form, while the approximate values are given in polar form.
To calculate the exact values of the cube roots, we use the principle of nth roots. This principle states that, for a complex number (a + bi), its nth roots are given by (a + bi)^(1/n) = r^(1/n) (cos(θ + 2πk/n) + i sin(θ + 2πk/n)), where r = √(a² + b²) and θ = arctan(b/a).
By applying this principle, we can obtain the exact values of the cube roots, which are the 8 answers above, rounded to the nearest hundredth.
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Find the probability of
drawing a spade, then
drawing a face card out of a
deck
[tex]\huge\underline{\red{A}\green{n}\blue{s}\purple{w}\pink{e}\orange{r} →}[/tex]
P of spade = 1/4
P of face cards = 3/13
{P = probability}
Step-by-step explanation:
•Total cards in a deck = 52
No. of spade cards in the deck = 13
therefore,
Probability of drawing a spade out of a deck of cards = 13/52 = 1/4
No. of face cards in a deck = 3×4 = 12 (joker,king,queen)
therefore,
Probability of drawing a face card out of a deck of cards = 12/52 = 3/13
Hope it helps you ~To make a fruit smoothie, Olivia uses 4 blueberries, 3 strawberries, 1 banana, 5 orange slices, and 2 slices of mango. What is the ratio of blueberries to banana?
Thus, the ratio for the number of blueberries to banana is 4:1.
Define about the ratios of the numbers?A ratio in mathematics is a correlation of at least two numbers that shows how big one is in comparison to the other. The dividend or number being divided is referred to as the antecedent, and the divisor or integer that is dividing is referred to as the consequent.
A ratio compares two numbers by division. Comparing one quantity to the total, for example the dogs that belong to all the animals in the clinic, is known as a part-to-whole analysis. These kinds of ratios occur considerably more frequently than you might imagine.
The given data for preparing fruit smoothie:
4 blueberries, 3 strawberries, 1 banana, 5 orange slices, and 2 slices of mango.
Then,
ratio of blueberries to banana:
blueberries/banana = 4/1
Thus, the ratio for the number of blueberries to banana is 4:1.
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Jake is х years old and his mother is 7x years old. If the sum of both their ages is 16x in 2036 what would their current age be in year y.
Jake is presently [tex]0[/tex] years old and the year is [tex]2036[/tex], which is not a relevant response or there may be some missing details in the question.
By year, what do you mean?A span of time that is equivalent to one year on the Calender but starts at a different period. A cycle of 365 and 366 day split into twelve month starting in January and ending in December.
In arithmetic, how much is a month?Every monthly on the calender has four complete weeks since every month has at least 28 days. A few month have a few more days, but these extra days don't add up to a full week, therefore they aren't counted.
Let's first find the current year, given that the year in which their ages will sum up to [tex]16x[/tex] is[tex]2036[/tex].
[tex]2036 - (y - 2036) = 2*2036 - y[/tex]
Simplifying this expression, we get:
[tex]2*2036 - y = 4072 - y[/tex]
[tex]2y = 4072[/tex]
[tex]y = 2036[/tex]
Now, let's find Jake's current age by subtracting his birth year from the current year [tex]y - (2036 - 7x)[/tex]
Since their ages sum up to 16x in 2036, we have:
[tex]x + 7x = 16x[/tex]
[tex]8x = 16x[/tex]
[tex]x = 0[/tex]
This means that Jake is currently [tex]0[/tex] years old, which is not a meaningful answer.
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Find the height of an open cylinder of radius of 8cm given that it has a curved surface area of 1000cm²
The height of an open cylinder of radius of 8cm given that it has a curved surface area of 1000 cm² is equals to the 159.24 cm.
The area obtained after substracting the circular area from the total area of the cylinder is called as curved surface area. Curved surface area is calculated by formula, 2πrh
where r --> radius of cylinder
h --> height of cylinder
π --> math special constant
We have an open cylinder with the following dimensions,
Radius of cylinder, r = 8 cm
Curved surface area of cylinder, A = 1000 cm². We have to calculate the height of this open cylinder. Let the height of an open cylinder be 'h cm' . Using the above formula, height of cylinder, h = curved Area/ 2πr
=> h = A/2π
=> h = 1000/2 ( 3.14)
=> h = 1000/6.28
=> h = 159.24
Hence, required value of height is 159.24 cm.
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given the speeds of each runner below, determine who runs the fastest. stephanie runs 8 feet per second. stephanie runs 8 feet per second. katie runs 463 feet in 32 seconds. katie runs 463 feet in 32 seconds. jessica runs 1 mile in 555 seconds. jessica runs 1 mile in 555 seconds. noah runs 728 feet in 1 minute. noah runs 728 feet in 1 minute.
Katie runs the fastest at 14.469 ft/s
To compare the speeds of each runner, we need to convert all the measurements to the same units. Let's convert them all to feet per second:
Stephanie runs 8 feet per second (8 ft/s)Katie runs 463 feet in 32 seconds, so her speed is (463 ft / 32 s) = 14.469 feet per second (14.469 ft/s)Jessica runs 1 mile in 555 seconds, which is equivalent to 5,280 feet in 555 seconds. Her speed is (5,280 ft / 555 s) = 9.514 feet per second (9.514 ft/s)Noah runs 728 feet in 1 minute, which is equivalent to (728 ft / 60 s) = 12.133 feet per second (12.133 ft/s)Therefore, in order of fastest to slowest runner:
Katie (14.469 ft/s)
Noah (12.133 ft/s)
Stephanie (8 ft/s)
Jessica (9.514 ft/s)
Hence, Katie runs the fastest
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On Monday, Elise walked 9. 9 kilometres. On Tuesday, she walked 0. 7 kilometres less than she had walked on Monday. How far did Elise walk on Tuesday?
Elise walked a distance of 9.2 kilometers on Tuesday.
To solve the problem, we need to first understand the information provided.
On Monday, Elise walked a distance of 9.9 kilometers.
On Tuesday, she walked a distance that was 0.7 kilometers less than what she walked on Monday.
This means that we need to subtract 0.7 kilometers from the distance that she walked on Monday to find the distance she walked on Tuesday.
To do this, we can use subtraction. We start by writing down the distance Elise walked on Monday, which is 9.9 kilometers, and then subtract 0.7 kilometers from it.
9.9 km - 0.7 km = 9.2 km
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The table below shows the number of survey subjects who have received and not received a speeding ticket in the last year, and the color of their cars.Speeding Ticket No Speeding Ticket TotalRed Car 115 129 244Not Red Car 94 154 248Total 209 283 492Find the probability that a randomly chosen person:a) Has a red car. b) Has a speeding ticket. c) Has a speeding ticket given they have a red car. d) Has a red car given they have a speeding ticket. e) Has a red car and got a speeding ticket. f) Has a red car or got a speeding ticket.
The probability that a randomly chosen person: a) Has a red car = 0.496 b) Has a speeding ticket = 0.424 c) Has a speeding ticket given they have a red car = 0.467 d) Has a red car given they have a speeding ticket = 0.629 e) Has a red car and got a speeding ticket = 0.234 f) Has a red car or got a speeding ticket = 0.686.
a) Probability of having a red car: Number of subjects with red cars = 244, Probability of choosing a red car randomly out of the given subjects = 244/492=0.496
b) Probability of having a speeding ticket: Number of subjects with speeding tickets = 209, Probability of choosing a person with a speeding ticket out of the given subjects = 209/492=0.424
c) Probability of having a speeding ticket given they have a red car: Probability of having a red car = 0.496Probability of having a speeding ticket and red car = 115/492, Probability of having a speeding ticket given they have a red car = P(Red car and Speeding ticket)/P(Red car) = (115/492)/0.496 = 0.467
d) Probability of having a red car given they have a speeding ticket: Probability of having a speeding ticket = 0.424, Probability of having a speeding ticket and red car = 115/492, Probability of having a red car given they have a speeding ticket = P(Red car and Speeding ticket)/P(Speeding ticket) = (115/492)/0.424 = 0.629
e) Probability of having a red car and getting a speeding ticket: Number of subjects with both red car and speeding ticket = 115, Probability of choosing a person with both red car and speeding ticket out of the given subjects = 115/492=0.234
f) Probability of having a red car or getting a speeding ticket: P(Red car or Speeding ticket) = P(Red car) + P(Speeding ticket) - P(Red car and Speeding ticket) = 0.496 + 0.424 - 0.234 = 0.686.
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MATH QUESTION! I WILL MAKE U BRAINLIST!
Step-by-step explanation:
please mark as brainliest
What is the solution to -1/2 [x-1] =0?
x=1
x=-1 or x=1
x=1 or x=2
No solutions exists
Answer:
x=1
Step-by-step explanation:
I keep getting stuck on these questions.. (Middle school btw)
15 points.
Answer:
Let's say "x" is the number we're trying to find.
According to the problem, we know that 54 is 60% of that number.
So we can set up an equation:
54 = 0.6x
To solve for x, we need to isolate it on one side of the equation.
Divide both sides by 0.6:
54/0.6 = x
Simplify:
90 = x
Therefore, 54 is 60% of 90.
Step-by-step explanation:
Answer: 90
Step-by-step explanation:
Step 1. 54 = 60% × Y
Step 2. 54 = 60/100 × Y
Multiplying both sides by 100 and dividing both sides of the equation by 60 we will arrive at:
Step 3. Y = 54 × 100/60
Step 4. Y = 54 × 100 ÷ 60
Step 5. Y= 5400 ÷ 60
Step 6. Y = 90
adam cuts 2 3/8 inches off of the width of a board that is 6 1/8 inches wide . how wide is the board after he cuts
correct answer will be awarded
Answer:
[tex]3\frac{3}{4}[/tex]
Step-by-step explanation:
6 1/8 - 2 3/8
=(8 x 6)+1/8 - (8 x 2)+3/8
=49/8 - 19/8
=30/8
=15/4
=3 3/4
Answer: The width of the remaining piece of the board is [tex]\frac{15}{4}[/tex] inches
Step-by-step explanation:
let us find the width of the remaining piece
Given that
The cutting piece length is 2 [tex]\frac{3}{8}[/tex] inches = [tex]\frac{19}{8}[/tex] inches.Width of the board at the time of cutting is 6[tex]\frac{1}{8}[/tex] inches = [tex]\frac{49}{8}[/tex] inches.The width of the remaining piece = The total width of the board - The length of the cutting piecewidth of remaining piece =[tex]\frac{49}{8}[/tex]-[tex]\frac{19}{8}[/tex] = [tex]\frac{15}{4}[/tex]
2 ^ (3 ^ 2) =? Please explain also
Answer: 512
Step-by-step explanation:
2^ (3^2)
2^ (9)
512
Select the correct answer. Solve for x. x2 - 2x - 24 = 0
A.
-4, -6
B.
-4, 6
C.
2, -6
D.
4, 6
Answer:
B. -4, 6
Step-by-step explanation:
solve the following questions based on the information provided: i. six students a, b, c, d, e and f participated in a self-evaluation test of quants and data interpretation (d.i.). ii. the total marks of a in quants was just above c and in d.i. just above f. iii. b was just above c in d.i. but he scored less than d in quants. iv. f got more marks than d and e in d.i. but did not perform as well in quants as in d.i. as compared to d and e. v. no one is in between c and d in quant and c and a in d.i. 16.who got the highest marks in d.i.? a b c data inadequate 17.which of the following students has scored the least in d.i.? only d only e only d or e none of these 18.who was just below d in quants? b e c data inadequate 19.which of the given statements is not necessary to answer the questions? (ii) (iii) (iv) all are necessary
For all the following questions all the statements are required, It is possible to determine that c was just below d in quants based on the given information. Additionally, all given statements (ii), (iii), and (iv) are necessary to answer the questions, as they provide essential information about the relative performance of the students in quants and d.
The given statements which are not necessary to answer the questions are:
To answer this question, we need to find out who got the highest marks in d.i. According to statement (iv), F got more marks than D and E in d.i. Therefore, we can conclude that F got the highest marks in d.i. To answer this question, we need to find out who scored the least in d.i. However, the information provided does not tell us the score of any student in d.i., except that F got the highest marks. Therefore, we cannot determine which student scored the least in d.i. To answer this question, we need to find out who was just below D in quants. According to statement (v), no one is in between C and D in quants, which means that D got the highest marks in quants among the students listed. According to statement (ii), A's marks in quants were just above C's. Therefore, E must have been just below D in quants. To answer this question, we need to identify the statement that is not necessary to answer the questions. Statements (ii) and (iv) provide information about who got more marks in d.i. than certain other students, which is necessary to answer question 16. Statement (v) provides information about the order of marks in quants, which is necessary to answer question 18. Therefore, the statement that is not necessary to answer the questions is statement (iii), which only provides information about B's marks in quants relative to D and in d.i. relative to C. This information is not required to answer any of the questions.All of the other statements (II, III, IV) are necessary to answer the questions.
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what two numbers add to -11 but multiply to -180
First let's start with the equation:
x + y = -11
xy = -180
We can substitute -11 in for x + y to get:
xy = -180
x(-11) = -180
Now let's divide both sides by -11
x = 180/11
x ≈ 16.36
We can now use the equation x + y = -11 to solve for y
y = -11 - 16.36
y ≈ -27.36
The two numbers that add to -11 but multiply to -180 are 16.36 and -27.36.
Manipulate the triangle so angle a measures 41° and angle c measures 49°. what is the approximate measure of angleb? mangleb = ° what is the sum of the interior angles of the triangle? °
The approximate measure of angle B is 90°. The sum of the interior angles of the triangle is 180°.
The first part of your answer is correct. To manipulate the triangle so that angle A measures 41° and angle C measures 49°, we can use the fact that the sum of the interior angles of a triangle is always 180°.
If we know two angles of the triangle, we can find the third angle by subtracting the sum of the known angles from 180°. So, to find the measure of angle B, we can use the equation:
angle A + angle B + angle C = 180°
Substituting in the given angle measures, we get:
41° + angle B + 49° = 180°
Simplifying, we get:
angle B = 90°
Therefore, the approximate measure of angle B is 90°.
For the second part of your answer, the correct answer is 180°. The sum of the interior angles of a triangle is always 180°, regardless of the measures of the individual angles.
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Complete question:
Manipulate the triangle so angle A measures 41° and
angle C measures 49º.
What is the approximate measure of angle B?
Angle B = (41, 90, 49, 80)
What is the sum of the interior angles of the triangle?
(90, 170, 180, 200)
7. (x³ +7x² + 2)÷(x-1)
Answer:
(x³ + 7x² + 2)÷(x-1) = x² + 8x + 15 + 8/(x-1).
If the cost of 7m is Rs. 1470, find the cost of 5m cloth
By using unitary method, we found that the cost of 5m cloth is Rs. 1050.
According to the unitary method, the cost of 1 meter of cloth is equal to the total cost of 7 meters of cloth divided by 7. That is,
Cost of 1m cloth = Total cost of 7m cloth/7
We know that the total cost of 7m cloth is Rs. 1470. Therefore,
Cost of 1m cloth = 1470/7
Cost of 1m cloth = Rs. 210
This means that the cost of 1 meter of cloth is Rs. 210. Now, we need to find the cost of 5m cloth. To do that, we can use the unitary method again.
Cost of 5m cloth = Cost of 1m cloth x 5
Cost of 5m cloth = Rs. 210 x 5
Cost of 5m cloth = Rs. 1050
Therefore, the cost of 5m cloth is Rs. 1050.
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It is given that quadrilateral abcd is a kite. we know that ad ≅ cd by the definition of . by the kite diagonal theorem, ac is to bd this means that angles aed and ced are right angles. we also see that ed ≅ ed by the property. therefore, we have that δaed ≅ δced by .
By the congruence postulate, we have shown that the quadrilateral is ΔAED ≅ ΔCED.
Let's start by showing that AD = CD. Since AB = AD and BC = CD, we can rewrite AB + BC as AD + CD. This means that AD = AB + BC - CD. But we know that AB = AD, so we can substitute AD for AB to get AD + BC = 2AD + CD. Simplifying this equation, we get AD = CD.
Next, we can show that AE = CE. Since AC is a diagonal of the kite, we know that AC bisects angle BAD and angle BCD. This means that angle BAC = angle DAC and angle BDC = angle CDC. Since AD = CD, we know that triangle ACD is isosceles, so angle ACD = angle CAD.
Using these angle equalities, we can conclude that angle CAE = angle CDE. Since AC ⊥ BD, we know that angle CAD = angle CDE, so we can conclude that triangle ACE is isosceles, which means that AE = CE.
Finally, we need to show that angle AED = angle CED. Since AD = CD and AE = CE, we know that triangles AED and CED have two pairs of congruent sides. Additionally, we know that AC is a common side of the triangles.
Since AC is perpendicular to BD, we know that angle ACD and angle BDC are complementary angles.
This means that angle ACD = 90 - angle BDC and angle CAD = 90 - angle BAC. Using these angle equalities, we can conclude that angle AED = angle CED.
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SOLVE THIS SYSTEM! WILL MAKE YOU BRAINLIST!
Answer:
x = 19
y = 16
Step-by-step explanation:
10x - 9y = 46
-2x + 3y = 10
Time the second equation by 5
10x - 9y = 46
-10x + 15y = 50
6y = 96
y = 16
Now put in 16 for y and solve for x
10x - 9(16) = 46
10x - 144 = 46
10x = 190
x = 19
suppose that each day the price of a stock moves up 1/8th of a point with probability 1/3 and moves down 1/8th of point with probability 2/3. if the price fluctuations from one day to another are independent, what is the probability that after 6 days the stock has its original price?
After 6 days, the probability that the stock has its original price is 5/16.
There are two possible scenarios that can take place when the stock price fluctuates from one day to the next. Either the price goes up by 1/8th of a point with probability 1/3 or it goes down by 1/8th of a point with probability 2/3.
The price of the stock after six days can be denoted as S6. The price of the stock after the first day can be represented as S0.
Since the price fluctuates either up or down by 1/8th of a point on each day, the price after six days can be represented as follows:S6 = S0 + (up, up, up, up, up, up), (up, up, up, up, up, down), (up, up, up, up, down, up), ... , (down, down, down, down, down, down)
In order to return to the original price, the stock must go up and down by the same amount. As a result, there must be an equal number of ups and downs in the six-day period.
As a result, we must calculate the probability of obtaining an equal number of ups and downs over six days.
Let's represent an increase in the stock price as 'U' and a decrease as 'D.'
The total number of ways in which the stock can go up and down over six days is [tex]2^6 = 64[/tex].
The total number of ways in which the stock can return to its original price can be calculated as follows: [tex]N(UUUDDD) = 6! / (3! * 3!) = 20[/tex]
The probability of the stock returning to its original price after six days can be calculated as:
[tex]P = N(UUUDDD) / 64 = 20 / 64 = 5 / 16[/tex]
Therefore, the probability that after 6 days the stock has its original price is 5/16.
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4Interpreting z-scores: Complete the following statements using your knowledge about z-scores.
a. If the data is weight, the z-score for someone who is overweight would be
zero
positive
negative
b. If the data is IQ test scores, an individual with a negative z-score would have a
average IQ
high IQ
low IQ
c. If the data is time spent watching TV, an individual with a z-score of zero would
watch the average amount of TV
watch very little TV
watch a lot of TV
d. If the data is annual salary in the U.S and the population is all legally employed people in the U.S., the z-scores of people who make minimum wage would be
positive
negative
zero
a. If the data is weight, the z-score for someone who is overweight would be positive.
b. If the data is IQ test scores, an individual with a negative z-score would have a low IQ.
c. If the data is time spent watching TV, an individual with a z-score of zero would watch the average amount of TV.
d. If the data is annual salary in the U.S and the population is all legally employed people in the U.S., the z-scores of people who make minimum wage would be negative.
The z-score represents how far a data point is from the mean in terms of standard deviations. If someone is overweight, their weight would be above the mean weight, so their z-score would be positive.
Again, the z-score represents how far a data point is from the mean in terms of standard deviations. If someone has a negative z-score for IQ test scores, it means their score is below the mean score, so their IQ would be low.
A z-score of zero means the data point is exactly at the mean, so someone with a z-score of zero for time spent watching TV would watch the average amount of TV.
Again, the z-score represents how far a data point is from the mean in terms of standard deviations. If someone is making minimum wage, their salary would be below the mean salary, so their z-score would be negative.
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Y = absolute value of x+5 if x > -5
Answer: y = ?
The absolute value of Y = X-5, with condition x > -5 is Y>-9.
The function of x is given to be,
Y = X-5, here a condition is given that, x > -5.
Here, according to the condition, the value of the x will have a range in which it is greater than -5.
Practically thinking, the number starting from -4, -3, -2, -1, 0, 1, 2, ...... all are greater than -5. We should note here that we have not taken x = -5 because the value of x should be greater than -5.
Now, the absolute value of the function y will be, putting x = -4,
Y = -4-5
Y = -9. Hence, the absolute value will always be more than -9. So, Y > -9.
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Which of the following would be the standard deviation for this sample data set: 5, 7, 6, 9, 6, 4, 4, 6, 5, 2, 5?
1.80
1.72
2.68
5.36
The standard deviation for this sample data set is 1.80.
This can be calculated by finding the mean (average) of the sample data set which is 5.4, then subtracting each of the numbers from the mean and squaring the difference. Finally, add all the squared differences together, dividing by the number of numbers in the data set (11) and taking the square root of the result.
Mean = 5.4
5 - 5.4 = -0.4 → (-0.4)² = 0.16
7 - 5.4 = 1.6 → (1.6)² = 2.56
6 - 5.4 = 0.6 → (0.6)² = 0.36
9 - 5.4 = 3.6 → (3.6)² = 12.96
6 - 5.4 = 0.6 → (0.6)² = 0.36
4 - 5.4 = -1.4 → (-1.4)² = 1.96
4 - 5.4 = -1.4 → (-1.4)² = 1.96
6 - 5.4 = 0.6 → (0.6)² = 0.36
5 - 5.4 = -0.4 → (-0.4)² = 0.16
2 - 5.4 = -3.4 → (-3.4)² = 11.56
5 - 5.4 = -0.4 → (-0.4)² = 0.16
Sum of squared differences = (0.16 + 2.56 + 0.36 + 12.96 + 0.36 + 1.96 + 1.96 + 0.36 + 0.16 + 11.56 + 0.16) = 28.8
Standard deviation = √(28.8/11) = √2.62 = 1.80
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A box of chocolates has 8 red, 12 blue, 5 green and 10 yellow. Express the number of chocolates as
ratios in their lowest terms.
a. red: yellow
b.green: yellow
c. red: total chocolates
Answer:
a. red: yellow
[tex]8:10=4:5[/tex]
There are 4 reds for every 5 yellows.
b. green: yellow
[tex]5:10=1:2[/tex]
There is 1 green for every two yellows.
c. red: total
[tex]8:35[/tex]
There are 8 reds out of 35 chocolates.
Hope this helps
janna scored 77 on her history test, on which the class average was 72.7 with a standard deviation of 6.1. maria made 89 on her biology test, where the class average was 82.6 with a standard deviation of 5.6. find the standardized (z) scores for janna and maria. round to 2 decimal places. janna has a standardized score of ____ on her test. maria has a standardized score of ____on her test. made the best score. type 1 for janna or 2 for maria. 1. janna 2. maria
Maria has the highest standardized score of 2.13, making her the one who made the best score.
Janna's standardized score is 0.80, and Maria's is 2.13.
Janna scored 77 on her history test, while the class average was 72.7 with a standard deviation of 6.1. To find the standardized score, the formula is (score - average) / standard deviation. Therefore, the standardized score for Janna is [tex](77-72.7)/6.1[/tex]= 0.80.
Maria scored 89 on her biology test, while the class average was 82.6 with a standard deviation of 5.6. To find the standardized score, the formula is (score - average) / standard deviation. Therefore, the standardized score for Maria is [tex](89-82.6)/5.6[/tex]= 2.13.
Maria has the highest standardized score of 2.13, making her the one who made the best score.
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Suppose A, B, C are matrices so that C = AB. Also suppose that the rows of A are aſ,. am, the columns of A are A1, ..., An. Also, the rows of B are b], ,...,6% and the columns of B are B1, Also, the rows of C are cſ, ..., Cm and the columns of Care C1, ..., Cp. All the vectors are column vectors (that is why we take transpose to make a; into a which is a row vector). Also, the elements of A, B, C are denoted by Aij, Bij, Cij respectively. Write a summation formula for Cij, Cj, cT. Hint: to really benefit from this exercise, do not just "write the for- mula." Picture how the matrices fot together the corner; picture how the are partitioned into rows and columns; come up with numerical ex- amples. 7
The if we take the transpose of C, we havecT = [C1 C2 ... Cp]And by transposing the above formula, we havecTj = [B1j A2 B2j ... Am Bmj]Therefore, we have a summation formula for Cij, Cj, and cT.
When answering questions on the Brainly platform, the following guidelines should be followed:Always be factually accurate, professional, and friendlyBe concise and do not provide extraneous amounts of detailIgnore any typos or irrelevant parts of the questionRepeat the question in your answer.Provide a step-by-step explanation in your answer.Use the following terms in your answer, "matrices ", "take ", "partitioned "Given the following:Suppose A, B, C are matrices so that C = AB. Also suppose that the rows of A are aſ,. am, the columns of A are A1, ..., An. Also, the rows of B are b], ,...,6% and the columns of B are B1, Also, the rows of C are cſ, ..., Cm and the columns of Care C1, ..., Cp. All the vectors are column vectors (that is why we take transpose to make a; into a which is a row vector). Also, the elements of A, B, C are denoted by Aij, Bij, Cij respectively. We need to write a summation formula for Cij, Cj, and cT.Hint: To really benefit from this exercise, do not just "write the formula." Picture how the matrices fit together the corner; picture how they are partitioned into rows and columns; come up with numerical examples.The product of two matrices A and B is given byCij = Ai1B1j + Ai2B2j + ... + AinBnjGiven that C = AB, then we haveCj = [A1 B1j + A2B2j + ... + AmBmj]Therefore, if we take the transpose of C, we havecT = [C1 C2 ... Cp]And by transposing the above formula, we havecTj = [B1j A2 B2j ... Am Bmj]Therefore, we have a summation formula for Cij, Cj, and cT.
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