y = 3x + 21\nwhich ordered pair is a solution to the equation?\na. (-2,15)\nb. (0,-7)\nc. (15,36)\nd. (24,1)

Explanation:

Step1: Substitute x and y values of option A

For the ordered - pair (-2, 15), substitute x = - 2 into the equation y = 3x+21. Then y = 3*(-2)+21. $y=3\times(-2)+21=-6 + 21=15$.

Step2: Substitute x and y values of option B

For the ordered - pair (0, - 7), substitute x = 0 into the equation y = 3x+21. Then y = 3*0+21 = 21≠ - 7.

Step3: Substitute x and y values of option C

For the ordered - pair (15, 36), substitute x = 15 into the equation y = 3x+21. Then y = 3*15+21=45 + 21 = 66≠36.

Step4: Substitute x and y values of option D

For the ordered - pair (24, 1), substitute x = 24 into the equation y = 3x+21. Then y = 3*24+21=72 + 21 = 93≠1.

Answer:

A. (-2, 15)