Solve using substitution y=-7x^2-9x+6 y= 1/2x+11 y=-x^2+x-5 y=x-5 y=3x^2-2x-1 y=x-1 y=2x^2-3x-1 y=x-3

1) y=−7x2−9x+6

2)y=1/2x +11

3) y=−x2+x−5

4) y=x−5

5) y=3x2−2x−1

6) y=x−1

7) y=2x2−3x−1

8) y=x−3

Step-by-step explanation:

$53.50

step-by-step explanation:

you have to subtract the amount of money chuck earned ($72.50) by the cost of the gas for the mower ($11.25) and the new string for the trimmer he bought ($7.75).

72.50-11.25=61.25

and then subtract $61.25 by the second thing he bought (the new string for the trimmer)

61.25-7.75=53.5

so in total it's $53.50 (53 dollars and 50 cents)