Answer:
answer is c makes sense because you just add 1.25 x 20
use dat brain
Step-by-step explanation:
square of 15 + square of x = square of 21
225 + square of x = 441
441 - 225 = 216
x = 216
300+12x = 450
or
B. 12x+300 = 450
13.25 × 4 = 53
Hope this helps
