Solve using double substitution

y=x-7

y=-2x+8

You have 56 marbles to share with your friends. If each friend gets exactly 4 marbles, which equation could use to solve for the number of friends, n?

Amanda earned a score of 940 on a national achievement test that was normally distributed. The mean test score was 850 with a standard deviation of 100. What proportion of students had a higher score than Amanda? Use your z table.

What is the greatest common factor of 25 and 90

The World Trade Center building in New York City has 110 stories. If an employee rode the elevator to her office on the 83rd floor, then came down 35 floors to deliver a report, which floor is she on now?

How to solve 927-352 using number line

3 (1.4*10^6) multiply or divide. write tje answer in scientific notation

The period of F (x) = 2 cos x is

A city block has 3 stores and a 20 foot mural on one side of the street. On the other side of the street there are 5 stores. If all the storefronts are equal length, what's the length of the city block?

Во время прогулки папа сделал 16 снимков.

Suppose someone tells you that she has a triangle with sides having lengths 2.6, 8.1, and 8.6. Is this a right triangle? Why or why not? Is there an angle in the triangle larger than 90 degree?