-Stats- Researchers claim that the mean time (in years) that passenger cars were kept by the original owner before being sold is less than pickup trucks. Records of 40 used passenger cars and 40 used plokup were randomly selected For ears, the mean was 5.3 years with a known population standard deviation 2.2 years. For pickup trucks the mean was 7.1 years with known population standard deviation of years. Is there enough evidence to support the claim? Assume the populations are normally distributed and use a significance level of %

a complex number is a number that can be expressed in the form a + bi, where a and b are real numbers, and i is a solution of the equation x2 = −1. because no real number satisfies this equation, i is called an imaginary number. has no real solution, since the square of a real number cannot be negative.

the required function is .

step-by-step explanation:

from the given table it is noticed that the graph passing through (-3,7), (0,4), (3,1) and (8,-4).

it is a linear function because the value of y is decrease by one as the value of x increase by 1.

the slope of the function is

the slope of the function is -1 and the y-intercept is 4.

the slope intercept form is

where, m is slope and b is y-intercept.

therefore the required function is . the graph of this function is shown below.

no ,sorry if you needed it but you can ask and try to see if any one will anwser ,

step-by-step explanation:

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c.

step-by-step explanation:

because first you have to add the 4x, 9x, and the 7x together and you get 20x and then you add the last numbers up and you get 5and then you put the subtraction sign in there and that's how you get the answer.