Tina babysat eight times. She earned $15, $20, $10, $12, $20, $16, $80, and $18. What is the average amount of money she made?

Company A charges a fee of $5 for a cab ride, plus a charge of $0.50 for each mile driven. Company B charges a fee of $10 for a cab ride, plus a charge of $0.10 for each mile driven.

Jane is building a tank for her pet snake. The tank's minimum length should equal two-thirds of the snake's length, and the tank's width should be equal to half the snake's length. Jane's snake is 2 1/2 feet long.

The difference of two numbers, a and b, is 21. The difference of 5 times a and two times b is 18. What are the values of a and b? A. 4,1 B. - 19,40 B. 20,1 C. 30,9 D. - 8,-29

Solve x^2+12=-11 by completing the square. Which is the solution of the equation

7x+11y = 5 14x+cy = 8 If c is a constant, for what values of c will there be no solution (x, y) to the system of equation A. 5 B. 7 C. 18 D. 22

Sixty years ago, your mother invested $4,500. today, that investment is worth $430,065.11. what is the average annual rate of return she earned on this investment?

two cards are drawn without replacement from a standard deck of 52 playing cards. what is the probability of choosing a diamond and then without replacement another diamond?

Find the volume of the parallelepiped (box) determined by uv and w

At a certain college, the ratio of men to women is 5 to 4. If there are 2800 men, how many women are there?

How long would it take for a girl to run 7 miles?