option (b) is correct
step-by-step explanation:
to find the solution of this system, we need to convert it into reduced row-echelon form. we have,
after applying row operations r2 -> r2/2 and r3 -> r3/3, we get,
16
the answer is 54 sq. ft. i just did this question, on odyssey ware, and it was right. make brainliest.