Max engine life is 900 hours. 27 engines were removed with an average life of 635.50 hours. What percent of the maximum engine life was achieved?

Jack did 3/5 of all problems on his weekend homework before sunday. on sunday he solved 1/3 of what was left and the last 4 problems. how many problems were assigned for the weekend?

Write two point-slope equations for the line passing through the points (6, 5) and (3, 1)

Solve 2 - 3 cos x = 5 + 3 cos x for 0° ≤ x ≤ 180° a. 150° b. 30° c. 60° d. 120°