How to find the missing side of this triangle

Acarton of juice contains 64 ounces miss wilson bought six cartons of juice how many ounces of juice did she buy

Recall that two angles are complementary if the sum of their measures is? 90°. find the measures of two complementary angles if one angle is twenty dash nine times the other angle.

Which of the following points is a solution to the system of equations shown? y - x = -1 x + y = -5