Answer:
3
Step-by-step explanation:
10x + y = 22 A
2x + y = -2 B
A - B left A - left B = Right A - Right B
10x + y - (2x + y) = 22-(-2)
10x + y -2x -y = 22 + 2
8x = 24
x = 24/8
x = 3
Answer: A, (y-1)^2/49-x^2/81=1
Answer: 1/x
69
A. $21.59
$151.13 ÷ 7 tons= $21.59 each per ton
