The values of the expression following the collection of like terms, rearranging and factoring are presented as follows;
1.1 4·x + 5·a + 3·a + x - 6 = 5·x + 8·a - 6
1.2. 6·a·b + 2·b - 16·a - 2 = 2·(3·a·b + b - 8·a - 1)
1.3. 1024000 : 360000 : 180000 = 256 : 90 : 45
1.4. 150 min : 3 hours = 5 : 6
What is a mathematical expression?A mathematical expression comprises of mathematical symbols, numbers and variable, properly arranged to represent a value.
The simplification of the expressions can be presented as follows;
1.1. 4·x + 5·a + 3·a + (x - 6)
The terms in the above expression can be rearranged as follows;
4·x + 5·a + 3·a + (x - 6) = 4·x + x + 5·a + 3·a - 6
4·x + x + 5·a + 3·a - 6 = 5·x + 8·a - 6
Therefore, whereby the expression in the question is; 4·x + 5·a + 3·a + (x - 6), we get;
4·x + 5·a + 3·a + (x - 6) = 5·x + 8·a - 61.2. Whereby the possible expression in the question is; 6·a·b + 2·b - 16·a + (-2), we get;
The factor common to the terms of the expression 6·a·b + 2·b - 16·a + (-2) is 2. Therefore by factoring the expression, we get;
6·a·b + 2·b - 16·a + (-2) = 3·(a·b + b - 8·a - 1)1.3. 1024000: 360,000 : 180,000
The expression is a ratio of the form a : b : c
Dividing each term in the ratio by 1,000, we get
1024000 ÷ 1000 : 360,000 ÷ 1000 : 180,000 ÷ 1000 = 1024 : 360 : 180
1024000: 360,000 : 180,000 = 1024 : 360 : 180
The common factors of 1024, 360 and 180 are; 1, 2, and 4
Therefore, the GCF of 1024, 360, and 180 is 4
Dividing the terms of the ratio 1024 : 360 : 180 by 4, we get;
1024 ÷ 4 : 360 ÷ 4 : 180 ÷ 4 = 256 : 90 : 45
Therefore;
1024000: 360,000 : 180,000 = 256 : 90 : 451.4 150 min : 3 hours
The above ratio can be simplified by rewriting the ratio using unit conversion as follows;
3 hours = 180 minutes, therefore;
150 min : 3 hours = 150 min : 180 min
150 : 180 = 5 : 6
Therefore; 150 min : 180 min = 5 min : 6 min
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Shown below are the steps of a proof by contraposition of the statement "If n is an integer and 5n + 3 is odd, then n is even." Match each step with its explanation.1. Assume n is not even, that is, it is odd. 2.Then n = 2k + 1 for some integer k. 3.5n + 3 = 5(2k + 1) + 3 = 10k + 8 = 2(5k + 4) 4. Hence, 5n + 3 is even. Negation of the conclusion Definition of an odd integer Definition of an even number Arithmetic
The correct explanation of each step is 1. Assume n is not even, that is, it is odd. - Negation of the conclusion. 2.Then n = 2k + 1 for some integer k. - Definition of an odd integer.
What is contraposition of the statement?When one is familiar with the inverse statement, it is simple to comprehend how to construct a contrapositive statement. Take the negation of the hypothesis and the conclusion to produce the conditional statement's opposite. Create the inverted statement first, then swap the hypothesis and conclusion to create the contrapositive of the conditional statement.
3.5n + 3 = 5(2k + 1) + 3 = 10k + 8 = 2(5k + 4) - Definition of an even number
1. Assume n is not even, that is, it is odd. - Negation of the conclusion.
2.Then n = 2k + 1 for some integer k. - Definition of an odd integer.
3.5n + 3 = 5(2k + 1) + 3 = 10k + 8 = 2(5k + 4) - Definition of an even number Arithmetic.
4. Hence, 5n + 3 is even.
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what is the standard deviation of 5,7,9,11,13
Answer: √8
Step-by-step explanation:
Step 1: Find the mean.
(5+7+9+11+13)/5 --> 45/5 = 9
Step 2: Find each score's deviation from the mean.
5-9= -4
7-9= -2
9-9= 0
11-9= 2
13-9= 4
Step 3: Square each deviation from the mean.
-4^2 = 16
-2^2= 4
0^2 = 0
2^2 = 4
4^4 = 16
Step 4: Find the sum of squares.
16+4+0+4+16 = 40
Step 5: Find the variance.
40/5 = 8
Step 6: Find the square root of the variance.
the square root of 8 is √8
A map of the province of Québec has a scale of 1: 1 200 000. The distance between Trois Pistoles and Québec city is 125 miles. What is the distance on the map? Give your answer to the nearest sixteenth of an inch.
The answer is 9 11/16 inches.
What is distance?
Distance is the total movement of an object without any regard to direction.
To find the distance on the map, we need to convert the actual distance of 125 miles into the equivalent distance on the map, using the scale of 1:1 200 000.
Let's call the distance on the map d. Then, using the scale, we can write the relationship:
d = (1/1 200 000) * 125 miles
d = 0.0001041667 miles
Since one inch on the map represents 1/1 200 000 miles in real life, the distance on the map can be calculated as:
d (in inches) = 0.0001041667 miles * (1 inch/0.0001041667 miles)
d (in inches) = 9.672
Rounding to the nearest sixteenth of an inch, the answer is 9 11/16 inches.
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Which of the following is the square of a binomial
Markup problems-fill blanks
Filling in the markup and markup rate is as follows:
Cost Selling Price Markup Markup Rate
1. $26.97 $49.95 $22.98 85.21%
2. $71.97 $119.95 $47.98 66.67%
3. $40.98 $74.38 $33.40 81.5%
4. $46.20 $69.99 $23.79 55.5%
5. $69.29 $125.98 $56.69 81.82%
6. $149.79 $224.87 $75.08 50.12%
7. $13,250 $16,562.50 $3,312.50 25%
8. $107.97 $199.96 $91.99 85.2%
What is the markup?Markup represents the additional cost added to the cost price to determine the selling price.
Markup rate is based on the cost price, unlike the margin, which is computed on the selling price.
1) Markup rate = Markup/Cost Price = ($22.98/$26.97 x 100)
2) Markup rate = ($47.98/$71.97 x 100)
3) Selling price = $74.38
Markup rate = 81.5%
Cost price = 100%
Selling price = 181.5%
$74.38 = 181.5%
Cost price = $40.98 ($74.38/181.5 x 100)
4) Selling price = $69.99
Markup rate = 55.5%
Cost price = 100%
Selling price = 155.5%
$69.99 = 155.5%
Cost price = $46.20 ($69.99/151.5 x 100)
5) Selling price = $125.98
Markup = $56.69
Cost price = $69.29 ($125.98 - $56.69)
Markup rate = 81.82% ($56.69/$69.29 x 100)
6) Selling price = $224.87
Markup = $75.08
Cost price = $149.79 ($224.87 - $75.08)
Markup rate = 50.12% ($75.08/$149.79 x 100)
7) Cost price = $13,250
Markup rate = 25%
Markup = $3,312.50 ($13,250 x 25%)
Selling price = $16,562.50 ($13,250 + $3,312.50)
8) Cost price = $107.97
Markup rate = 85.2%
Markup = $91.99 ($107.97 x 85.2%)
Selling price = $199.96 ($107.97 + $91.99)
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10. Five men took 15 days to dig a hole. How long would 25 men take to dig the same hole working at the same pace?
Answer: Three days
5 men divided by the 15 days it took to dig the hole, equals 3. Which means it took three times as much time as the amount of workers who dug the hole.
This means it will take three days to dig the whole with 25 workers.
I hope this helped. Good Luck <3.
Suppose the value of y and the value of x vary together at a constant rate of change (so that Δy=0.5⋅Δx), and y=2.5 when x=2.
a. Suppose the value of x
varies from x=2 to x=5.75.
What is the value of y when x=5.75?
a) how far has the beam diverged from its assigned target when it reaches the moon? (the distance from the earth to the moon is 240,000 mi. round your answer to the nearest mile.)
The beam has diverged from its target by approximately 2097.80 miles when it reaches the moon.
What is the tangent function?
The tangent function is one of the main six trigonometric functions and is generally written as tan x. It is the ratio of the opposite side and the adjacent side of the angle in consideration in a right-angled triangle.
To calculate the distance the beam has diverged from its target, we need to find the horizontal distance the beam has traveled.
To do this, we'll use the tangent function:
tan(0.5°) = horizontal_distance / 240,000 miles
Rearranging the equation and solving for the horizontal distance, we get:
horizontal_distance = 240,000 miles * tan(0.5 degrees) = 240,000 miles * 0.008726646 = 2097.80 miles
Therefore, the beam has diverged from its target by approximately 2097.80 miles when it reaches the moon.
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HELP ITS DUE BRO PLEASE SHOW WORK
By substituting the values and solving the equation for x, the value of x in both the subparts is as follows:
(A) x = 5/2
(B) x = 1
What are equations?They are connected by using the equal sign.
An example formula might be 3x - 5 = 16. We discover that the variable x has a value of 7 after solving this equation.
So, we have:
5x - 7
-3x + 3
(A) f(x) + g(x)
5x - 7 + -3x + 3
5x - 7 -3x + 3
2x - 5
2x = 5
x = 5/2
(B) g(x) - f(x)
-3x + 3 - (5x - 7)
-3x + 3 - 5x + 7
-8x + 8
-8x = -8
x = 1
Therefore, by substituting the values and solving the equation for x, the value of x in both the subparts is as follows:
(A) x = 5/2
(B) x = 1
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A store in Hampton bought a leather chair for $494.47 and marked it up 100% from the original cost. Later on, Sally purchased the leather chair and paid Hampton sales tax of 5.5%. How much, including tax, did she pay for the leather chair?
$
Answer: The markup percentage of 100% means the store added an amount equal to the original cost of the chair to its price, so the selling price of the chair before tax was 494.47 * 2 = $989.94.
The sales tax is calculated as 5.5% of the selling price before tax, which is 5.5/100 * 989.94 = $54.45.
The total amount paid by Sally for the leather chair, including tax, is 989.94 + 54.45 = $1044.39.
Step-by-step explanation:
A manufacturing produces 931 units in 7 hours. The production rate is consistent each hour. How many hours does it take to produce 1,330 units?
A. 190
B. 133
C. 10
D. 14
Answer: C. 10
Step-by-step explanation:
931 / 7 = 133
so, 133 units per hour
133x = 1,330
1,330 / 133 = 10
Your answer is 10 hours, or option C
POD has a project with the following cash flows:
Year Cash Flows
0 −$ 249,000
1 147,100
2 164,600
3 129,700
The required return is 8.4 percent. What is the profitability index for this project?
Answer:
Step-by-step explanation:
The profitability index (PI) is a measure used in capital budgeting to evaluate the financial viability of an investment. It is calculated by dividing the present value of the future cash flows by the initial investment. The formula for calculating the profitability index is:
PI = Present value of future cash flows / Initial investment
To calculate the present value of the future cash flows, we need to discount each cash flow to its present value using the required return of 8.4 percent. The present value of each cash flow is as follows:
Year 0: -$249,000 (no discounting necessary for the initial investment)
Year 1: $147,100 / (1 + 0.084)^1 = $135,870.37
Year 2: $164,600 / (1 + 0.084)^2 = $137,672.76
Year 3: $129,700 / (1 + 0.084)^3 = $100,636.20
The present value of the future cash flows is the sum of the present values of each cash flow:
PV = $135,870.37 + $137,672.76 + $100,636.20 = $374,179.33
Now we can calculate the profitability index:
PI = $374,179.33 / $249,000 = 1.5035
Therefore, the profitability index for this project is 1.5035. This means that for every dollar invested in the project, the project is expected to return $1.50 in present value of future cash flows. A profitability index greater than 1.0 indicates that the project is expected to generate positive net present value and is therefore a good investment.
Please helpppppppp meeeeee asappppppppp pleaseeeeeeee !!???
To find a common denominator for 7/8 and 13/16, we can find the least common multiple (LCM) of 8 and 16, which is 16.
LCM's meaning ?
lowest common factor
Describe LCM. Least Common Multiple is a mathematical term. The smallest number that is a multiple of both of two numbers is called the least common multiple.
7/8 can be written as 7 * (2/2) / 8 = 7 * 2 / 16 = 7/16
13/16 is already in the form of a fraction with a denominator of 16, so no further modification is needed.
So, 7/8 can be written as 7/16 and 13/16 can be written as 13/16.
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Let give the number of liters of fuel oil burned in hours, and the number of gallons burned. Find a formula for by scaling the output of . Use the fact that 1 gallon equals 3.785 liters. You may enter the function verbatim, as you would for any other named function.
Answer: To convert liters of fuel oil burned in hours to gallons, we can use the conversion factor that 1 gallon is equal to 3.785 liters. The formula for the conversion can be represented as a function:
def liters_to_gallons(liters):
return liters / 3.785
Here, the input liters represents the number of liters of fuel oil burned in hours, and the output of the function is the equivalent number of gallons. The function performs the conversion by dividing the input value (in liters) by the conversion factor (3.785).
The following data gives real GDP (Y), total factor productivity (A), and Capital (K), for two years.
1980 Y=400 A=1 K=25
1990 Y=990 A=1.1 K=81
Assume the production function is Y=A K0.5L0.5. By what percentage did labor grow between 1980 and 1990?
A) 40.75% B) 20.15% C)96% D) 56.25%
The labor grew by 25% between 1980 and 1990. The answer is D) 56.25%
How to calculate the percentages?
Percentage is a way of representing a fraction of 100. To calculate the percentage of a certain quantity, you can use the following formula:
Percentage = (part / whole) x 100
Given the production function Y = A * K⁰ॱ⁵ * L⁰ॱ⁵, we can calculate the growth of labor (L) between 1980 and 1990 by using the information on real GDP (Y), total factor productivity (A), and capital (K).
We can rearrange the production function to find L:
L = (Y / A) / K⁰ॱ⁵
For 1980:
L = (400 / 1) / 25⁰ॱ⁵ = 2
For 1990:
L = (990 / 1.1) / 81⁰ॱ⁵ = 2.5⁰ॱ⁵
Now, we can find the percentage growth of labor between 1980 and 1990 by using the formula:
Percentage growth = (L1990 - L1980) / L1980 * 100
Percentage growth = (2.5 - 2) / 2 * 100 = 25%
So, the labor grew by 25% between 1980 and 1990. The answer is D) 56.25%
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Given that 6^(y+3)=2(x+9), find the ratio of x to y
The ratio of x to y is given by 3 : 1
What is Proportion?The proportion formula is used to depict if two ratios or fractions are equal. The proportion formula can be given as a: b::c : d = a/b = c/d where a and d are the extreme terms and b and c are the mean terms.
The proportional equation is given as y ∝ x
And , y = kx where k is the proportionality constant
It demonstrates the equality of the relationship between the expressions printed on the left and right sides.
Given data ,
Let the proportion be represented as A
Now , the value of A is
6 ( y + 3 ) = 2 ( x + 9 )
On simplifying , we get
6y + 18 = 2x + 18
Subtracting 18 on both sides , we get
6y = 2x
Divide by 2 on both sides , we get
x = 3y
Divide by 3 on both sides , we get
x/y = 3/1
Therefore , the proportion is x : y : : 3 : 1
Hence , the ratio is 3 : 1
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Order of Operations with Decimals Consider this expression. 15.05 + (6.25 − 3.75) x 2.05
Question 1 When simplifying the given expression, which is the second operation to perform?
Responses
A 15.05 + 2.515.05 + 2.5
B 15.05 x 2.515.05 x 2.5
C 6.25 − 3.756.25 − 3.75
D 2.5 x 2.052.5 x 2.05
Question 2 Simplify 13.95 ÷ 5 x (8.34 − 6.09).
Responses
A 6.27756.2775
B 2.66952.6695
C 5.84355.8435
D 3.0375
15.05 + 2.5x 2.05 is the second operation and 13.95 ÷ 5 x (8.34 − 6.09) value is 6.2775, Option A is correct.
What is Expression?An expression is combination of variables, numbers and operators.
The given expression is 15.05 + (6.25 − 3.75) x 2.05.
By using BODMAS rule we apply the operations.
15.05 + (6.25 − 3.75) x 2.05.
Firstly we solve the expression in parenthesis.
15.05 + 2.5x 2.05.
The other expression is 13.95 ÷ 5 x (8.34 − 6.09).
2.79 x (2.25)
6.2775
Hence, 15.05 + 2.5x 2.05 is the second operation and 13.95 ÷ 5 x (8.34 − 6.09) value is 6.2775, Option A is correct.
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Linear equation that passes through the points of (-12,14) and (6,-1)
ASAP PLS
Answer:
y = -15/18 x - 12
Step-by-step explanation:
The linear equation that passes through the points (-12, 14) and (6, -1) can be found by using the point-slope form of a line. The point-slope form of a line is given by:
y - y1 = m(x - x1)
where (x1, y1) is a point on the line, m is the slope of the line, and (x, y) are the coordinates of any other point on the line. To find the equation of the line passing through the points (-12, 14) and (6, -1), we can use either of the two points as (x1, y1) and find the slope m using the other point.
Let's use the point (-12, 14) as (x1, y1):
m = (y2 - y1) / (x2 - x1)
= (-1 - 14) / (6 + 12)
= -15/18
y - 14 = -15/18 (x + 12)
Simplifying the equation, we get:
y = -15/18 x - 12
This is the linear equation that passes through the points (-12, 14) and (6, -1).
Answer:
First you need to find the slope of the line joining the two points
Slope = [tex]\frac{(14-(-1))}{((-12)-6)}[/tex] =[tex]\frac{15}{-18}[/tex]
then find the equation
y-(-1) = 15/-18 (x-6)
y+1 = 15/-18 x +5
y = -15/18 x + 4
you can present the equation in the above way or multiply the whole equation by 18 if you do not want any fractions
EASY POINTS!
At the local grocery store (Store A), the price of carrots is proportional to their weight, in
ounces. The equation representing this relationship is given by y = 0.40x.
Meanwhile, the market in the next town (Store B) sells their carrots by the pound,
represented in the table shown here:
Which store is currently selling their carrots at a cheaper unit rate?
Store A sells at cheaper rate.
What is Slope?A line's slope is determined by how its y coordinate changes in relation to how its x coordinate changes. y and x are the net changes in the y and x coordinates, respectively. Therefore, it is possible to write the
change in y coordinate with respect to the change in x coordinate as,
m = Δy/Δx where, m is the slope
Given:
Store A: y= 0.40 x
so, the unit rate is 0.40.
Store B:
The cots of 3 pound carrot= 20.16
and, the cost of 48 ounce carrot = 20.16
and, cost per ounce= 20.16 /48= 0.42
So, the unit rate is 0.42.
Thus, store A sells at cheaper rate.
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Given the preimage ABC, describe a sequence of transformations that produces the
image A'B'C'
Answer:
At point B rotate ABC clockwise 90 degrees. Translate the figure two units to the left. At point B dilate the figure with a scale factor of 2.
Step-by-step explanation:
equation 3x+y=0. Plot the theme points that are in the solution wet, drow a line
through the three points and then answer the questions below
(1,7) (-8,4) (-2,6) (-5,5) (2,-6) (3,-9)
Step-by-step explanation:
The equation 3x + y = 0 can be rearranged to y = -3x. This means that the graph of the equation is a straight line with slope -3 and y-intercept of 0.
The three points that are in the solution set are (-2,6), (-5,5), and (3,-9). Plotting these points on a coordinate plane and connecting them with a straight line, we can see that they all lie on the same line with slope -3:
[Graph not shown here, but a straight line with three points (-2, 6), (-5, 5), (3, -9) can be plotted with a slope of -3 and y-intercept of 0.]
From the graph, we can see that the line passes through the origin (0,0), which means that the y-intercept is 0. The slope of the line is -3, which means that the line has a negative slope and is downward sloping. The line separates the plane into two half-planes, one above the line and one below the line. The points above the line have y-coordinates greater than 0 and the points below the line have y-coordinates less than 0.
This table gives a few
(
x
,
y
)
(x,y)left parenthesis, x, comma, y, right parenthesis pairs of a line in the coordinate plane.
x
xx
y
yy
16
1616
44
4444
24
2424
64
6464
32
3232
84
8484
What is the
y
yy-intercept of the line?
Answer:
he y-intercept of the line is the point (0,-41)
Step-by-step explanation:
Hope this is right!
when the stretched string of the apparatus represented below is made to vibrate, point p does not move. point p is most probably at the location of
A node is a point of no displacement in a standing wave. Therefore, if point P does not move, it is most likely located at a node. the points along the wave that experience maximum displacement are called antinodes.
A node is a point of no displacement in a standing wave, meaning that if the stretched string of the apparatus represented is made to vibrate, point P will not move. Point P is most likely located at a node as it experiences no displacement. A standing wave is created when two waves combine and the resulting wave is stationary. The points along the wave that experience no displacement are called nodes, and the points along the wave that experience maximum displacement are called antinodes. Nodes can be found at points that are integral multiples of half the wavelength of the wave. Therefore, it can be concluded that point P is at a node since it does not move when the string is made to vibrate.
The complete question is :
When the stretched string of the apparatus represented below is made to vibrate, point p does not move. Point p is most probably at the location of _____.
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How can I find the perimeter of rectangle
Let's consider what the question asks for:
--> perimeter of a rectangle
To find the perimeter of the rectangle:
--> we need to know the side length
Let's consider how to find our side length:
--> in a rectangle
--> opposite parallel sides are equal in length
--> in a mathematical equation, we get:
[tex]4x-4y=3x+5y\\2-2y=x-3y[/tex]
Now we notice,
--> in the second equation, there is only one 'x'
--> therefore if we find a y-value to substitute into the 'x'
--> we can solve
Let's use the first equation to see how 'x' and 'y' relate to each other:
[tex]4x-4y=3x+5y\\4x-3x=4y+5y\\x=9y[/tex]
Let's use that x-value and plug it the second equation:
[tex]2-2y=x-3y\\2-2y=(9y)-3y\\2-2y=6y\\2=8y\\\\y=\dfrac{1}{4}[/tex]
Since x = 9y:
[tex]x=9y=9*\dfrac{1}{4} =\dfrac{9}{4}[/tex]
Let's find each side length:
[tex]4x-4y=4(\dfrac{9}{4}) -4(\dfrac{1}{4} )=9-1=8\\\\2-2y=2-2(\dfrac{1}{4} )=2-\dfrac{1}{2} =\dfrac{3}{2} =1.5\\\\3x+5y=3(\dfrac{9}{4})+5(\dfrac{1}{4} )=\dfrac{27}{4} +\dfrac{5}{4} =\dfrac{32}{4}=8\\ \\x-3y=\dfrac{9}{4} -3(\dfrac{1}{4})=\dfrac{9}{4}-\dfrac{3}{4} =\dfrac{6}{4} =1.5[/tex]
Let's add up the side length to find the perimeter:
[tex]\text{Perimeter}=8+1.5+8+1.5=9.5+9.5=19[/tex]
Answer: 19
Volume of Cylinders, Cones, and Spheres
1
2
The diameter of a sphere is 4 centimeters. Which represents the volume of the sphere?
○ 3² cm³
π
O 87 cm³
○ 64 cm³
O 167 cm³
Answer:[tex]\frac{32\pi }{3} cm^{3}[/tex]
Step-by-step explanation:
Since the diameter is 4 cm, we know the radius is 2 cm since diameter = 2 x radius. The formula for a sphere's volume is [tex]\frac{4\pi }{3}[/tex]×[tex]r^{3}[/tex], so by plugging in 2 we get [tex]\frac{4\pi }{3}[/tex]×[tex]2^{3}[/tex] = [tex]\frac{4\pi }{3}[/tex] x 8 = [tex]\frac{32}{3}[/tex] [tex]\pi[/tex] [tex]cm^{3}[/tex]
If each student tosses the coin 200 times, about 99.7% of the sample proportions should bebetween what two numbers?A) 0.394 and 0.606B) 0.106 and 0.1414C) 0.4925 and 0.5075D) 0.0015 and 0.9985E) 0.00075 and 0.99925
Using the sample proportions we know that the sample proportion of 99.7% will come between (C) 0.4925 and 0.5075.
What are sample proportions?The sample proportion is a random variable that can't be predicted with certainty because it fluctuates from sample to sample.
It will be represented as a random variable by the letter P.
Both the mean and the standard deviation are P.
The formula for the sample proportion P is P=X/N, where X stands for the number of successes and N for the sample size.
You anticipate the sample fraction to reflect the outcomes.
This can frequently be ascertained by using the findings of an earlier survey or by conducting a brief pilot study.
Use 50% if you're unsure because it's conservative and produces the biggest sample size.
So, we have:
99.7% of the sample proportion and tosses were 200 times.
Then,
= 99.7/200
= 0.4985
Which comes between, .4925 and 0.5075.
Therefore, using the sample proportions we know that the sample proportion of 99.7% will come between (C) 0.4925 and 0.5075.
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In a sample of 800 students in a university, 160 or 20% are Business majors. The 20% is an example of
a population.
descriptive statistics.
a sample.
statistical inference.
In a sample of 800 students in a university, 160 or 20% are Business majors the 20% is an example of D. statistical inference.
What is statistical inference?Based on a random sample, statistical inference is a technique for determining a population's characteristics. Analyzing the correlation between the dependent and independent variables is helpful. Estimating uncertainty or sample to sample variation is the goal of statistical inference.
The technique of employing data analysis to deduce characteristics of an underlying probability distribution is known as statistical inference. By generating estimates and testing hypotheses, for instance, inferential statistical analysis infers characteristics of a population.
Therefore, option D is correct.
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Suppose Sine (x) = negative three-fifths and cos(x) < 0. What the value of cos(2x)?
The value of cos (2x) is 7/25.
What are Trigonometric Functions?Trigonometric functions are defined as the real functions which are simply the functions of an angle of a triangle. They are basically the periodic functions which relate an angle in a right angled triangle to the ratios of the length of two sides.
Given that,
sin x = -3/5 and cos (x) < 0
We have a trigonometric formula,
cos (2x) = 1 - 2 sin²(x)
Substituting the values given,
cos (2x) = 1 - 2 × (-3/5)²
= 1 - (2 × 9/25)
= 1 - 18/25
= 7/25
Hence the value of cos (2x) is 7/25.
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A cyclist planned to ride 9 1/2 miles but only managed to travel 3 7/8 miles. What fraction of his planned trip did he travel?
Can anyone help with this please?
The fractional part that cyclist covered from his planned journey is 31/76.
What is fraction?
In mathematics, a fraction is used to denote a portion or component of the whole. It stands for the proportionate pieces of the whole. Numerator and denominator are the two components that make up a fraction. The numerator is the number at the top, and the denominator is the number at the bottom.
The total distance cyclist plans to travel in fraction is = 9(1/2) miles.
The distance cyclist covers in fraction is = 3(7/8) miles
The fraction of distance that cyclist travelled is -
Distance Travelled / Original distance planned
Substitute the value in the equation -
3(7/8) / 9(1/2)
Convert into improper fractions -
(31/8) / (19/2)
Use the arithmetic operation of division -
(31/8) / (19/2)
(31/8) × (2/19)
(31/4) × (1/19)
31/76
Therefore, the cyclist travelled 31/76 fraction of his planned journey.
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HELP ASAP, TELL ME THE CODE FOR THIS STUFF (for example, AGHI also it has to be in all caps.