5x+2y=7
7x-2y=5 its subtract not add
X+30+70=180
x+100=180. -100 both sides
x=80
|x=80° |
Answer:
the answer is 445.5
Step-by-step explanation:
what I did was divide 50 by 495 and got 9.9 then since it took 45 minutes every 50 square feet of floor i multiplied 45 x 9.9 and got 445.5