Which pair of angles add up to 180 degrees?

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?

Which radical expression is a rational number? a. √ 360 b. √ 644 c. √ 225 d. √ 122

What is a correct first step in solving the inequality-4(3-5x)> -6x+9