Which set of angle measures could be the measures of the interior angles of a triangle?
a. 90°, 42°, and 58°
b. 60°, 60°, and 60°
c. 100°, 48°, and 42°
d. 31°, 75°, and 70°

Aswimming pool has an input pump for filling the pool and an output pump for emptying the pool. the input pump can fill the pool in 3 hours, and the output pump can drain the pool in 5 hours. as you go to bed, the pool is full, but a neighbor’s kid turns on the output pump. at midnight, you awake to find the pool half empty. immediately, you turn on the input pump, but you are sleepy and forget to turn off the output pump. at what time will the pool become full?

What is the perimeter of trapezoid jklm? + units 2 + + units 9 + units 9 + + units

Write the expression in complete factored form. 5n_(c - 3) - n(c - 3) =