Which are examples of variables?

+, -, -, -

x, y, ac

3,6,9, 12

4 + 6 - 2 = 8

7 trillion divide by 5 is what

cassie's book has 325 pages. she read 155 pages yesterday and the rest today. which equation expresses how many pages she read today?

The temperature at 5pm is 20 degrees. The temperature at 10pm is - 5 degrees. What is the equation

Dani added 20 pieces of candy to a dish, 2 days later 1/2 of the candy was gone. If there are 14 pieces left in the dish, how many pieces were in the bowl to begin with?

Josh will take ten test in five weeks how many will he take in five

What is the value of x? (2x-2) (3x-52)

A rental car cost a one time fee of $30 and then an additional $15 for each day it is rented. If the Webb family's total bill was $135, how many days did they rent the car?

4x+9y=9/:and/:2x-9y=-63

What is the 89,420 divided by 27

how do I work this problem out ... 23:560