8a + 12a - 7b - 9b - 11a

How to combine like terms

1. Phil, Steve, and Esther are aged 19 - 22, and none of them is the same age. Phil's age is an even number, and Steve and Esther have consecutive ages. Steve's age is an odd number, and he is older than Phil. Who is the oldest?

What is the value of 1-18 25 if you subtract then add? If you add then subtract? Why is order of operations necessary?

A semi-truck trailer is basically a rectangular prism. A typical height for the inside of these trailers is 108 inches. If the trailer is 8 feet wide and 20 feet long, what is the volume of the trailer

What is a proportional relationship

Factor the trinomial x^2 - 7x + 10

Solve the formula for the variable h. V = Bh/3 a. h = 3v/3 b. h = V / 3B c. h = 3V + B d. h = 3V - B

Convert 3/4 into a quotient and percentage

Simplify the expression 3 (-3y+2x) combine like terms a+3a-b+4b+c

If a figure has 5 sides 5 vertices and no equal sides what is it? it is a polygon BTW

If I rent a boat for $25 per hour and a charge additionally $12 for fuel is the number of hours I rent the boat proportional to the total cost