Add or subtract.

7z2 - 2z4 - 2z2 - 5z4

Two-thirds of a number minus six is 2

Jose buys a skateboard for $90 at Target. The sales tax is 8%.

Find the value of the expression below. 8 (15-4) / 4^2-5

X * y = - 7 x + y = 12 What are the values of x and y?

The waiting time, in minutes, to see a teller at a large bank follows an exponential distribution. If the proportion of all customers who wait more than 15 minutes is 0.01, what is the mean waiting time for all customers?

Kevin is 42 years old and Daniel is 3 years old. How many years will it take until Kevin is only 4 times as old as Daniel?

Write the equation of the circle in standard form in order to answer this question x2 + y2 - 4x + 6y + 9 = 0 What is the radius of this circle?

I'm thinking of two numbers that multiply to get 8 and add to get 6.

What is 10*2/5 in unit form?

Two sides of a triangle measure 5 in. and 12 in. Which could be the length of the third side?