Answer:
x=10,y= -2).
Step-by-step explanation:
The given system of equations is:
x = 10
3x + 5y = 20
We can use substitution to solve for y. Starting with the first equation:
x = 10
We can substitute the value of x into the second equation:
3x + 5y = 20
3 * 10 + 5y = 20
30 + 5y = 20
5y = 20 - 30
5y = -10
Finally, we can solve for y by dividing both sides of the equation by 5:
y = -10 / 5
y = -2
x=10,y= -2).
7 times the sun of 6 and 5
can some one help me..
Answer:
77
Step-by-step explanation:
here, you're multiplying 7 by the "sum of 6 and 5", which just means to add 6 and 5
so, you're multiplying 7 by 11
7*11=77
The amount of wheat exported by a country
increased exponentially each year between
2006 and 2015.
In 2011, the country exported 240,000 tonnes
of wheat.
In 2015, the country exported 685,464 tonnes
of wheat.
Work out how much wheat the country
exported in 2006.
Give your answer to the nearest tonne.
PLEASE HELP ME!!
Answer:
2011 2016 685,4632 thousand
Step-by-step explanation:
A cylinder has volume 78 cm. What is the volume of a cone with the same radius and height? A. 156cm3 B. 234cm3 C. 39cm3 D. 26cm3
The volume of a cone with the same radius and height is D. 26 cm³.
What is a cylindrical shape?A cylinder is a three-dimensional solid object with two bases that are identically circular and are connected by a curving surface that is located at a specific height from the center.
Examples of cylinders are toilet paper rolls and cold beverage cans.
The volume of a cylinder is πr²h and the volume of a cone is (1/3)πr²h.
Therefore, The volume of a cone of the same radius and height is one-third the volume of a cylinder.
Given, A cylinder has a volume of 78 cm³.
Therefore, The volume of a cone with the same radius and height is,
= (78/3) cm³
= 26 cm³.
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How to calculate coefficient of variation?
Answer:
Step-by-step explanation:
The coefficient of variation (CV) is a measure of the relative variability of a set of data. It is calculated as the ratio of the standard deviation to the mean, expressed as a percentage. The formula for calculating the CV is as follows:
CV = (Standard Deviation / Mean) * 100%
Here's how to calculate the CV step by step:
Calculate the mean: To find the mean, add up all the data points and divide by the number of data points. This will give you the average value of the data set.
Calculate the standard deviation: The standard deviation is a measure of the variability of a set of data. To calculate it, subtract each data point from the mean and square the result. Then add up the squared deviations and divide by the number of data points minus one. Finally, take the square root of the result to obtain the standard deviation.
Calculate the CV: Finally, divide the standard deviation by the mean and multiply by 100% to obtain the CV.
The CV is a useful measure when comparing data sets with different units of measurement or when comparing the variability of data sets with different means. It gives an indication of the degree of variation in the data set relative to the mean, with higher CV values indicating a higher degree of variability.
It is important to note that the CV should not be used to compare data sets with very different means, as it can be misleading in such cases. In those cases, it is better to use the standard deviation or other measures of variability.
Ms. Jancsi bought a new package of border decoration to put around the bulletin board in her classroom. The package contains 300 inches of border. The dimension of rectangle bulletin board are 8 feet b 3 feet. If she puts the board around all four sides of the bulletin board, how much leftover bulletin material will she have
Answer:
36in
Step-by-step explanation:
1ft = 12in
8ft = 96in 3ft = 36in
96*2 + 36*2 = 192 + 72 =264in
300-264=36
please please please help
The amount of time it would take for Mr. Smith's rocket to return to the ground is 8 seconds.
How to determine the time when the rocket would hit the ground?Based on the information provided, we can logically deduce that the height (h) in meters, of this rocket above the ground is related to time by the following quadratic function:
h(t) = -16t² + 128t
Generally speaking, the height of this rocket would be equal to zero (0) when it hits the ground. Therefore, we would equate the height function to zero (0) as follows:
0 = -16t² + 128t
16t² = 128t
16t = 128
Time, t = 128/16
Time, t = 8 seconds.
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How do you calculate interior painting cost?
The interior painting cost is calculated according to the cost of the paint and the area that to be painted.
Determine where there are carpets in your house. Increase this by four times. For example, multiply 500 square feet of carpet by four to get 20000 square feet. Find out the current rate per square foot that your painter charges. For instance, depending on the scenario, painters may charge anywhere between Rs 26 and Rs 30 per square foot. Consequently, your expense would be 27 x 2000, or Rs 54,000. This figure is on the high side. After taking measurements, the painter would provide you with a final statement outlining the specific amount of work performed. This is how interior painting cost is calculated.
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values showing on the dice.
(a) How many sample points are possible? (Hint: use the counting rule for multiple-step experiments.)
(b) List the sample points.
a) For a single roll of a standard six-sided dice, there are 6 possible outcomes.
b) Sample points for rolling a dice twice are:
(1,1), (1,2), (1,3), (1,4), (1,5), (1,6),
(2,1), (2,2), (2,3), (2,4), (2,5), (2,6),
(3,1), (3,2), (3,3), (3,4), (3,5), (3,6),
(4,1), (4,2), (4,3), (4,4), (4,5), (4,6),
(5,1), (5,2), (5,3), (5,4), (5,5), (5,6),
(6,1), (6,2), (6,3), (6,4), (6,5), (6,6)
a) If we want to find the number of sample points for multiple rolls of a dice, we use the counting rule for multiple-step experiments, which states that if an experiment consists of k steps and there are n1 possible outcomes for the first step, n2 possible outcomes for the second step, and so on, then the total number of possible outcomes for the experiment is:
n1 x n2 x ... x nk
For example, if we roll a dice twice, then there are 6 possible outcomes for the first roll and 6 possible outcomes for the second roll. Therefore, the total number of possible outcomes for rolling a dice twice is:
6 x 6 = 36
b) Here are the sample points for a single roll of a standard six-sided dice:
1, 2, 3, 4, 5, 6
Here are the sample points for rolling a dice twice:
(1,1), (1,2), (1,3), (1,4), (1,5), (1,6),
(2,1), (2,2), (2,3), (2,4), (2,5), (2,6),
(3,1), (3,2), (3,3), (3,4), (3,5), (3,6),
(4,1), (4,2), (4,3), (4,4), (4,5), (4,6),
(5,1), (5,2), (5,3), (5,4), (5,5), (5,6),
(6,1), (6,2), (6,3), (6,4), (6,5), (6,6)
Each sample point consists of two values, representing the outcomes of the first and second rolls, respectively. The sample points are written in parentheses and separated by commas.
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I need Help Quick!!!
Answer:
150-200
Step-by-step explanation:
On a trip from Louisiana to Florida, your family wants to travel at least 420 miles in 8 hours of driving. Write and solve an inequality to find what your average speed must be.
The required the average speed must be at least 52.5 mph to travel 420 miles in 8 hours.
What is inequality?A difference between two values indicates whether one is smaller, larger, or simply not equal to the other. A B indicates that a and b are not equal. When a b, an is said to be less than b. A > B indicates that an is superior to b. These two constitute tight inequity.
According to question:Let the average speed of the trip "x" in miles per hour. To find out what the average speed must be, we need to write an inequality based on the given information and then solve it.
The formula for distance, speed, and time is:
distance = speed * time
So, the distance traveled can be written as:
distance = x * 8 hours
And the inequality based on the given information that the distance must be at least 420 miles is:
x * 8 ≥ 420
To solve for x, we need to divide both sides of the inequality by 8:
x ≥ 420 / 8
x ≥ 52.5
So, the average speed must be at least 52.5 mph to travel 420 miles in 8 hours.
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The graph represents the distribution of the number of
questions answered correctly on a 50-question math
test.
24
28
Math Test Scores
32
36
40
44
48
X
What is the standard deviation of the data?
04
08
O 12
O 24
The standard deviation of the given data is 8.
Option B is the correct answer.
What is the standard deviation?To calculate the standard deviation of the given data, we can use the following formula:
σ = √ [Σ(xi - μ)² / N
where σ is the standard deviation, xi is each data point, μ is the mean of the data, and N is the total number of data points.
We have,
The mean of the data:
μ = (24 + 28 + 32 + 36 + 40 + 44 + 48) / 7
= 36
Now,
We can calculate the sum of squared differences from the mean.
Σ(xi - μ)²
= (24 - 36)² + (28 - 36)² + (32 - 36)² + (36 - 36)² + (40 - 36)² + (44 - 36)²
+ (48 - 36)²
= 144 + 64 + 16 + 0 + 16 + 64 + 144
= 448
And,
We can substitute these values into the formula for the standard deviation.
So,
σ = √ [Σ(xi - μ)² / N]
= √[448 / 7]
= 8.13
= 8
Therefore,
The standard deviation of the given data is 8.
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questions. Show your work.
1
If a company has 48 full-time employees (40 hours per week for
50 of the 52 weeks in a year) and 12 part-time employees who work
24 hours per week (for 50 weeks), how many labor hours are in the year?
If the company has experienced 6 recordable injuries, what is the IR?
The solution is, : d) 255 ≤ f(x) ≤ 340.
What is inequality?An inequality is a relation which makes a non-equal comparison between two numbers or mathematical expressions.
here, we have,
The function
f(x)= 8.5x
represents the amount of money that Steve earns given the number of hours, x, he works.
The dependent variable is the total amount that he earns, f(x) while the independent variable is the number if hours, x that he works. The range is the possible values of the dependent variable that satisfies the equation.
Steve works between 30 and 40 hours per week.
This means that the lowest amount that he earns is 8.5×30 = $255
The highest amount that he earns is 8.5× 40 = 340.
Therefore, the range is
255 ≤ f(x) ≤ 340
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A spinner is divided into six equal parts numbered 1, 2, 3, 4, 5, and 6. In a repeated experiment, Ryan spun the spinner twice. The theoretical probability of both spins being odd numbers is 9/36.
If the experiment is repeated 140 times, predict the number of times both spins will be odd numbers.
140
70
36
35
If the experiment is repeated 140 times, the number of times both spins will be odd numbers, 35.
What is probability?Probability is a mathematical term, which can be defined as the ratio of the number of favorable outcomes to the total number of outcomes of an event. The possibility that an event will occur is measured by probability.
Probability of Event = Favorable Outcomes/Total Outcomes = X/n
The theoretical probability of both spins being odd numbers is 9/36.
This means that, if the spinner was spun an infinite number of times, 9 out of every 36 spins would result in both spins being odd numbers.
In the repeated experiment, Ryan spun the spinner 140 times.
This means that, based on the theoretical probability, we can expect the number of times both spins will be odd numbers to be approximately
= 140 x 9/36
= 35
The answer is 35, with the expectation that the actual number of times both spins will be odd numbers in 140 trials may not be exactly 35.
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14/w = 8.4/5
Solve the proportion
The value of w is given by the proportion w = 8.333
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 equation be represented as A
Now , the value of A is
Substituting the values in the equation , we get
14 / w = 8.4 / 5
Multiply by w on both sides of the equation , we get
w ( 8.4 / 5 ) = 14
Multiply by 5 on both sides of the equation , we get
8.4w = 70
Divide by 8.4 on both sides of the equation , we get
w = 70 / 8.4
w = 8.333
Hence , the equation is w = 8.333
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two similar solids have base areas of 47cm2 (smaller solid) and 199cm2 (bigger solid) the smaller solid is 350cm3 volume
calculate volume of larger solid
The graphs of three functions are shown. Which accurately compares the functions on the graph?
1. All of the functions have a maximum
2. The square root and quadratic function share a minimum
3. The absolute value and quadratic function share a y-intercept
4. the absolute value and square root function share an x-intercept
The correct statement regarding the functions in this problem is given as follows:
4. the absolute value and square root function share an x-intercept
What is the x-intercept of a function?The x-intercept of a function is given by the value of x at which the graph of the function crosses the x-axis, that is, when x = 0.
Both the square root function (yellow) and the absolute value function (red) cross the x-axis, hence the correct option is given by option 4.
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Please help its 10 points
For the given figure, the surface area of box is 436.95m².
What is Rectangle?A plane shape, as opposed to a square, with four straight sides and four right angles, particularly one with uneven neighbouring sides.
The measurement of three-dimensional solids' surfaces the surfaces of three-dimensional solids, such as cubes, spheres, prisms, and pyramids, in
square or meter units, is known as Surface area.
Surface area of Square = side²
Surface area of Rectangle = Length x Breadth
Surface area of triangle = 1/2 × Base x Height
So,
Surface area of Square=
= 10² = 100m²
Surface area of Rectangle 1 =
= 11 x 9 = 99m²
Surface area of Rectangle 2 =
11 x 13.45 = 147.95m²
Surface area of Triangle =
= 1/2 x 10 x 9 = 45m²
So, Surface area of box = Surface area of Square + Surface area of
Rectangle 1+ Surface area of Rectangle 2 + Surface area of Triangle + Surface area of Triangle
= 100 + 99 + 147.95 + 45+ 45
= 436.95m²
Therefore, Surface area of the box is 436.95m².
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a tent that usually sells for $220 is on sale for 15% off what is the sale price
Answer:
Step-by-step explanation:
$220.00x .15 = $187.00
please help look at this image
The answer is D ( 1/3 cup dish soap)
Answer: D
explanation: i'm not good at explaining stuff
This season, the probability that the Yankees will win a game is 0.59 and the probability that the Yankees will score 5 or more runs in a game is 0.45. The probability that the Yankees lose and score fewer than 5 runs is 0.33. What is the probability that the Yankees would score fewer than 5 runs when they lose the game? Round your answer to the nearest thousandth.
Suggested: Needed in Decimal form (Regular outcome)
The probability that the Yankees scored fewer than 5 runs is 0.805.
What is probability?It is the chance of an event occurring from a total number of outcomes.
The formula for probability is:
Probability = Number of required events / Total number of outcomes.
We have,
We will use conditional probability.
P(A/B) = P(A∩B) / P(B)
The probability that the Yankees won a game.
= 0.59
This means,
The probability that the Yankees lost a game.
P(A) = 1 - 0.59 = 0.41
The probability that the Yankees scored 5 or more runs.
= 0.45
P(B) = The probability that the Yankees scored fewer than 5 runs.
So,
The probability that the Yankees lose and score fewer than 5 runs.
P(A ∩ B) = 0.33
Now,
The probability that the Yankees scored fewer than 5 runs.
P(B/A) =P(A∩B) / P(A)
So,
= 0.33 / 0.41
= 0.8048
= 0.805
Thus,
The probability that the Yankees scored fewer than 5 runs is 0.805.
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The diagram shows a garden in the shape of a rectangle.
4 + 3x
The perimeter of the garden is 32 metres.
Work out the value of x
x+6
The dimensions of the rectangular garden are 8.5 meters and 7.5 meters.
What is Perimeter?Perimeter of a straight sided figures or objects is the total length of it's boundary.
The diagram is given below.
Given,
Perimeter of a rectangle = 2 (l + w), where l is the length and width.
Length of the rectangle = 4 + 3x
Width of rectangle = x + 6
Perimeter = 32 meters
Substituting,
2 (l + w) = 32
2(4 + 3x + x + 6) = 32
2(4x + 10) = 32
4x + 10 = 16
4x = 6
x = 6 / 4 = 3/2 = 1.5
Length = 4 + 3x = 8.5 meters
Width = x + 6 = 7.5 meters
Hence the length and width of the rectangle are 8.5 meters and 7.5 meters respectively.
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the product of 7 x 2/21
Answer: The product of 7 and 2/21 is equal to 2/3.
Step-by-step explanation:
To multiply 7 by 2/21, we can first simplify 2/21 to its lowest terms by finding the greatest common factor of 2 and 21, which is 1. Then we can multiply 7 by 2 and divide the result by 21:
7 x 2/21 = (7 x 2) / 21 = 14 / 21
The fraction 14/21 can also be simplified to its lowest terms by dividing both the numerator and denominator by the greatest common factor, which is 7:
14/21 = (2 x 7)/(3 x 7) = 2/3
it takes 8.93 seconds for a train to travel 4 yards. How far does it take the train to travel 1 yard
Answer:
2.2325 seconds
Step-by-step explanation:
We know
It takes 8.93 seconds for a train to travel 4 yards.
How far does it take the train to travel 1 yard?
We take
8.93 divided by 4 = 2.2325 seconds
So, it takes the train 2.2325 seconds to travel 1 yard.
You are going to use an incline plane to lift a heavy object to the top of a shelving unit with a height of 7 ft. The base of the incline plane is 11 ft from the shelving unit. What is the length of the incline plane?
Answer:
We can use the Pythagorean theorem to solve this problem. Let's call the length of the incline plane "L". We know that the height of the shelving unit is 7 ft and the base of the incline plane is 11 ft. The hypotenuse of the right triangle formed by the incline plane, the floor, and the shelving unit will be the length of the incline plane. Using the Pythagorean theorem:
L^2 = 11^2 + 7^2
L^2 = 121 + 49
L^2 = 170
L = sqrt(170)
So the length of the incline plane is approximately 13.04 feet.
solving systems by substitution WS
3x-8(5x-3)=24
PLEASE HELP
Which expressions are equivalent to the one below? Check all that apply.
log 2-log 6
A. log 3
B. log 2
C. log(2) + log
-log()
□ D. log()
Equivalent expression for the expression ( log 2 - log 6 ) is,
⇒ - log 3
What is an expression?Mathematical expression is defined as the collection of the numbers variables and functions by using operations like addition, subtraction, multiplication, and division.
Given that;
The expression is,
⇒ log 2 - log 6
Now, Simplify the expression by using logarithmic rule as;
⇒ log 2 - log 6
⇒ log 2 / 6
⇒ log 1/3
⇒ log 3⁻¹
⇒ - log 3
Therefore, We get;
Equivalent expression for the expression ( log 2 - log 6 ) is,
⇒ - log 3
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Which equation demonstrates the distributive property?
Responses
A 15 x 40 = 40 x 1515 x 40 = 40 x 15
B (3 + 8)5 = 5(3 + 8)(3 + 8)5 = 5(3 + 8)
C 15 + 40 = 5515 + 40 = 55
D 15 + 40 = 5(3 + 8)
none of them
c cc c c c c c c c c c c c c c c c c
Prove: DFBE is a parallelogram
The proof of the parallelogram is given as follows:
A parallelogram is a quadrilateral with the following properties:
Opposite sides are parallel: The opposite sides of a parallelogram are equal in length and parallel to each other.Opposite angles are equal: The opposite angles of a parallelogram are equal in measure.Consecutive angles are supplementary: The sum of the measures of the consecutive angles in a parallelogram is equal to 180 degrees.Diagonals bisect each other: The diagonals of a parallelogram bisect each other and are equal in length.The opposite sides of a parallelogram are equal in length.These properties make parallelograms useful for studying transformations and in solving problems in geometry, physics, engineering, and other fields.
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what is the common name of the rectangular vessel where the solution to be analyzed by uv-vis spectrometry is poured into?
A cuvette or spectrophotometer cell is the conventional term for the rectangular container into which the solution to be examined by UV-Vis spectrometry is put.
A cuvette is a tiny, square or rectangular container that can be constructed of glass, plastic, or quartz and is used to hold little amounts of liquid samples.
It features two clear sides that are parallel to one another and is optically transparent.
The spectrophotometer measures the light that travels through the sample on these faces.
The cuvette's design guarantees consistent sample thickness and interference-free light transmission.
A more broad phrase, "spectrophotometer cell," can apply to any sort of cell or container used to store a sample for spectrophotometer examination, including cuvettes and other containers like test tubes or vials.
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What is the difference between percent error and percent different?
The difference between percent error and percent difference is that percent error is used to measure the accuracy of a predicted value compared to the actual value, while percent difference is used to compare two values to determine how much they differ from each other.
Percent error is calculated using the formula:
Percent error = (|actual value - predicted value| / actual value) x 100
Percent difference is calculated using the formula:
Percent difference = (|value 1 - value 2| / ((value 1 + value 2)/2)) x 100
In summary, percent error is used to measure the accuracy of a prediction or measurement, while percent difference is used to compare two values and determine how much they differ from each other.
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