Question

Multiple Choice 1. The sides of a triangle are in the ratio 3 : 4 : 5. What is the length of each side if the perimeter of the triangle is 90 cm? (1 point) A. 22.5 cm, 30 cm, and 37.5 cm B. 19.3 cm, 25.7 cm, and 32.1 cm C. 7.5 cm, 11.5 cm, and 32.1 cm D. 10.5 cm, 11.5 cm, and 12.5 cm 2. Is the following always, sometimes, or never true? 6 + 8x – 9 = 11x + 14 – 3x A. always true B. sometimes true C. never true 3. Solve the inequality. Graph the solution set. 5r + 4 ≤ 5

Answer 1

$3x + 4x + 5x = 12x =\ \textgreater \ 12x = 90 x = 90/12 = 15/2 3x = 3*(15/2) = 45/2 = 22.5 cm 4x = 4*(15/2) = 30 cm 5x = 5*(15/2) = 75/2 = 37.5 cm$