Question

Quadrilateral QRST is a rectangle. RT = 5x + 1 and QS = 6x – 3. Find QS.

A. 8

B. 21

C. 42

D. 4

Answer 1

21 is the answer

Explanation:

RT = QS

5x + 1 = 6x – 3

4 = x

QS = 6(4) – 3 = 21

Answer 2

21.

Explanation:

RT and QS are diagonals of the rectangle and are equal in length.

5x + 1 = 6x - 3

-x = -4

x = 4

So QS = 6(4) - 3

= 21.