y = 7x - 53 y = -4x + 35 a. ( -3, -8) c. ( -8, 3) b. ( 8, 3) d. No solution

the midpoint formula

Final answer:

To calculate the travel time to drive 160 miles at 70mph, use the formula Time = Distance ÷ Speed. The result is approximately 2.2857 hours, or about 2 hours and 17 minutes.

Explanation:

To calculate how long it takes to drive 160 miles at a constant speed of 70 miles per hour (mph), you can use the basic formula for time, which is Time = Distance ÷ Speed.

Distance to be traveled is 160 miles.

Speed of travel is 70 mph.

By plugging the numbers into the formula, we get:

Time = 160 miles ÷ 70 mph = 2.2857 hours.

To convert this time into minutes, we multiply by 60 (the number of minutes in an hour), so:

2.2857 hours × 60 minutes/hour = 137.1428 minutes, which is approximately 2 hours and 17 minutes.

When a researcher needs to compare means for a variable grouped into two categories based on some less-than interval variable, a t-test is appropriate.

To add, The analysis of two populations means through the use of statistical examination is called a t-test. Small sample sizes commonly use a t-test with two samples.  What statisticians call as test statistics are identified as t-values. A systematized value that is calculated from sample data during a hypothesis test is called a test statistic. The procedure that calculates the test statistic compares your data to what is expected under the null hypothesis.

You already have an experience with the basic principles behind a t-test if you’ve tried to communicated with a distracted teenager.

Answer:

[tex]cos(theta)=\frac{5}{13}[/tex]

Ratio is 5:13

Step-by-step explanation:

We are given with right angle triangle with side lengths

cos theta ratio is adjacent side divide by hypotenuse

In the triangle , adjacent side for theta is 5  and hypotenuse is 13

[tex]cos(theta)=\frac{adjacent}{hypotenuse}[/tex]

[tex]cos(theta)=\frac{5}{13}[/tex]

marathon = 26.2

hill is at least 10

26.2-10=16.2

X=  miles left

X<=16.2

To solve this problem, we should first identify the number of units that point Z was translated. The number of units of movement of point Z should be similar to the number of units of movement of points A and P.

Let us say that the movement is Δx and Δy for horizontal and vertical translations respectively.

From Z to Z’:

Δx = 1 – (-1) = 2

Δy = 1 - 5 =  - 4

Therefore the translation is in the form of (x + 2 , y – 4). Points A and P then becomes:

A’ = (1 + 2 , 3 – 4)

A’ = (3, -1)

P’ = (-2 + 2, 4 – 4)

P’ = (0, 0)

Answers:

A’ = (3, -1)

P’ = (0, 0)

Answer:

Step-by-step explanation:

lets be honest whos reading this when theres an expert answer

The mathematics problem set with cookies deals with basic addition: if you have 1 cookie and you take another from a friend, you have a sum of 2 cookies.

The subject here is basic arithmetic, a branch of mathematics.

If you start with 1 cookie (your own), and then you take || 'steal' || another cookie from your friend, you are basically adding that 1 cookie to the 1 cookie you already have. So, 1 cookie (yours) + 1 cookie (your friend's) = 2 cookies. Hence, you would have 2 cookies.

Remember, in real life, it's not nice to steal. This is just a math problem to help you understand the concept of addition.

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If I spent $186. Then my weekly income will be $930.

The quantity of anything is stated as though it were a fraction of a hundred.

I spent 20% of my weekly income on food.

If I spent $186.

Then my weekly income will be

Let x my weekly income.

0.2x = $186

     x = $930

More about the percentage link is given below.

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Answer:

A

Step-by-step explanation:

edge 2020 Dec 14

Answer:

0.23

Step-by-step explanation:

B is (-3,2) E is (4,-2)

4-(-3) = 4+3 =47

-2 -2 = -4

7^2 = 49

-4^2 = 16

Sqrt( 49+16)

Sqrt(65) = 8.062

 Round off to 8

The correct option is A )[tex]\frac{8}{\pi }[/tex]

To find the rate of change of a function from x = 0 to x = \\frac{\\pi}{2}, we need to apply the concept of the average rate of change.

This is essentially the change in the function's value divided by the change in x. Assume the function we are analyzing is y = f(x).

Step-by-Step Solution:

Average Rate of Change =[tex]\frac{f(\frac{\pi}{2}) - f(0)}{\frac{\pi}{2} - 0}[/tex]

When x = 0, f( x ) = - 4,

When x = π / 2, f( x ) = 0

Average Rate of Change =[tex]\frac{0- (-4)}{\frac{\pi}{2} - 0}[/tex]

Average Rate of Change =[tex]\frac{8}{\pi }[/tex]

The correct option is A )[tex]\frac{8}{\pi }[/tex]

The sum of the first 30 odd numbers is equal to the square of 30. To find the sum, we can use a formula for the sum of an arithmetic series. Plugging in the values, we get a sum of 900.

Conjecture: The sum of the first 30 odd numbers is equal to the square of the 30. To prove this conjecture, we can use a formula for the sum of an arithmetic series which is given by: S = n/2(2a + (n-1) d), where S is the sum of the series, n is the number of terms, a is the first term, and d is the common difference. In this case, the first term a is 1, the common difference d is 2 (since we are adding odd numbers), and the number of terms n is 30. Plugging in the values, we have: S = 30/2(2(1) + (30-1)2) = 15(2 + 58) = 900. Thus, the sum of the first 30 odd numbers is 900, which is equal to the square of 30.

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The correct answer to this would be:

“No, because the sample is not representative of the whole population.”

Since the sample values are the 10 highest annual salaries of TV personalities, they give almost no information about the salaries of TV personalities as a whole or in general. 

The standard deviation of a sample can indicate the variation in salaries of TV personalities, but may not always be accurate if the sample isn't representative or if outliers exist. The median salary is often a better measure for skewed distributions, and multiple statistics should be reported to fully describe economic data.

When considering the variation of salaries of TV personalities, the standard deviation of a sample is a crucial statistic that helps understand the dispersion around the mean salary. However, if the sample is not representative of the entire population or if there are outliers, such as extremely high salaries among TV personalities, it may not be a good estimate of the variation in general. The median salary might provide a more accurate descriptor of the central tendency, especially in a skewed distribution.

It is possible for the standard deviation to be greater than the average in cases where there is a significant spread of values, including outliers. For example, if a few TV personalities earn vastly more than others, it will increase the standard deviation. Additionally, the likelihood of the average salary of a larger group falling within a certain range is determined by the mean and standard deviation. If the distribution is normal, salaries will tend to cluster around the mean, which is why certain salary ranges are expected to be more common.

In a scenario where two companies wish to compare the average salaries of their employees, statistical tests that consider both the mean and standard deviation can help determine if there is a significant difference between the two. Similarly, when evaluating how long employees stay with a company, a study with the average time and associated standard deviation for each company would provide insight into retention rates.

When reporting salaries or any economic data, it is often wise to report multiple measures of central tendency and dispersion, such as the mean, median, and standard deviation, to provide a comprehensive view. This approach takes into account the full range of values, including any potential outliers or skewness in the distribution.