If ax + y=23, 3x - y = 9, and x = 8, what is the value of a?

What is t+16 for + =-5

When driving 878 by 31, a student finds a quotient of 28 with a remainder of 11. Check the students work, and use the check to find the error in the solution.

The unit rate of 80/20 sc B. 4ft/econds is A. 1/4 ft/sesec C. 40ft/sec D. 20ft/sec

How do I solve 7b+5-7b-2=-8

Sam is seven times as old as Tim. If Sam is 42 years old, how old is Tim?

What is the answer to this problem? 7-3x - 15=19

1/2a - 1/2 = - 3 solve the following equation

Henry wants to resize a 10 inch wide by 12 inch long photograph for the school newspaper. It is to fit in a space that is 5 inches wide. What is the length of the resized photograph in inches? a. 6 inches c. 4 inches b. 12 inches d. 7 inches

If X = 3 units, Y = 9 units, and Z = 5 units, what is the volume of the right rectangular pyramid shown above?

How many solutions does the equation 6y - 3y - 7 = - 2 + 3 have? A. Two B. None C. Only one D. Infinitely many Also explain how you got the answer so i can learn more about it.