1. If the standard deviation of a data set is 4. What is the variance?

Q: Solve for Ti ; P.V. Tz

A:

Q: Solve - 2x- 18 > 0. Represent the -2x - 1 | solution on a number line. -2x -11

A: This is a number line problem

Q: Trevor takes a test at school and completes the test in exactly one hour . The test has two…

A:

Q: The sum of two numbers is 53, and the difference between the numbers is 5. Find the numbers. The…

A: Given :  Sum of two numbers is 53.  Difference between the numbers is 5.

Q: 5. I agree with Barry since the numerator is a difference of squares and factors Barry says that g…

A: Solved below

Q: This answer is incorrect the answer is four digits.

A:

Q: 8 times a number is added to twice the number, the result is 70

A:

Q: Draw a picture for each situation and solve for the missing part.

A: The figure can be drawn as follows:

Q: 57. This question has two parts. A school's lunchroom staff made macaroni and cheese for lunch. This…

A: The below expression describes an amount of macaroni and cheese. 25×250