What is the solution to the following equation?

x + (-21) = 8

A window shaped like a parallelogram has a area of 18 and 1 3rd square feet. the height of the window is 3 and 1 3rd. how long is the base of the window

Given f (x) = x^2+2x+1 Find f (x+h-f (x)

On a map of Arizona, the scale is 1 inch = 5 inches. The distance between Brady's house and Flagstaff is 23 inches on the map. What is the actual distance between Brady's house and Flagstaff.

List of things in your house that are spheres and cubes

A triangular prism has a length of 5 inches, a base of 2 inches, a height of 2 inches, and sides of 2 inches and 3 inches. Find the surface area of the prism.

Find an equation in standard form for the ellipse with the vertical major axis of length 10 and minor axis of length 8

Find the volume of the cylinder with radius 9 cm and height 15 cm.

2 x 1296 + 2 x 648 + 2 x 648

2 6/27 in simplest form

Dennis spent $5 less on lunch than he spent on dinner. Dennis spent at most $12 on dinner. Write and solve an inequality to find how much Dennis spent on lunch.