Which equations are true for x = –2 and x = 2? check all that apply.
a. x2 – 4 = 0
b. x2 = –4
c.3x2 + 12 = 0
d.4x2 = 16
e.2(x – 2)2 = 0

6x - 8 = 16 solve the following equation. then place the correct number in the box provided.

Abird on top of a 200 ft bridge tower sees a man standing on the lower part of the bridge (which is 50 ft above the ground). the angle of depression from the bird is 26 ̊. how far is the man from the base of the bridge tower? with explanation and pictures .

The mean of 10 values is 19. if further 5 values areincluded the mean becomes 20. what is the meanthese five additional values? a) 10b) 15c) 11d) 22