The difference between two supplementary angles is 20°. what are the angles?
a) 70° and 50°
b) 55° and 35°
c) 80° and 100°
d) 60° and 80°

Mindy bought 5/8 pound of almonds and a 3/4 pound of walnuts.which pair of fraction cannot be used to find how many pounds of nuts she bought in all.

The equation x2 – 1x – 90 = 0 has solutions {a, b}. what is a + b?

If f(x) = 2x + 8 and g(x) = x4, what is (gº)?