Question

If QRST below is a rectangle, find x if angle S is equal to 7x + 55.

Answer 1

Because QRST is a rectangle, that means all of the angles must be a right angle, which are 90 degrees. Using this information, solve the expression by creating an equation that lets angle S = 90.

90 = 7x + 55
35 = 7x
x = 5