Answer:
$449.60
Step-by-step explanation:
12 x 12 = 144, her room is 144 square feet. One yard is three feet, making a square yard equal to 9 square feet. 144 divided by 9 is 16 square yards. Now we do 16 times the installation cost $28.10. So 16 x 28.10 = 449.6, or $449.60.
I hope this helps!
Yes it is absolutely right.
30
x=10
y=-10
multiply first row by 7
14x−21y=350
7x+8y=−10
multiply second row by 2
14x+16y=−20
subtract the first row by the second row
−37y=370
solve for y
y=−10
substitute y=-10
14x−21×−10=350
solve for x
and thats your answer
