Solve for x: 1 over 3 (2x − 8) = 4.

Given that de, df, and ef are midsegments of △abc, and de=3.2 feet, ef=4 feet, and df=2.4 feet, the perimeter of △abc is .

The parabola y = x² - 4 opens: a.) up b.) down c.) right d.) left

Suppose a pendulum is l meters long. the time,t,in seconds that it tales to swing back and forth once is given by t=2.01