2x+y+4z=16
5x-2y+2z=-1
X+2y-3z=-9

The area of a 25-inch tv screen is 300 square inches. the area of a 40-inch tv screen is 768 square inches. the are of the smaller screen is what percent of the area of the larger screen?

Acyclist bike x distance at 10 miles per hour .and returns over the same path at 8 miles per hour.what is the cyclist average rate for the round trip in miles per hour ?

Consider the first four terms of the sequence below. what is the 8th term of this sequence?