Asquare has an area of 64in2 what is the length of each side

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

For what values of x is x2 + 2x = 24 true?

Alcoa was $10.02 a share yesterday. today it is at $9.75 a share. if you own 50 shares, did ou have capital gain or loss ? how much of a gain or loss did you have ? express the capital gain/loss as a percent of the original price