Find the solution for the equation and check it.
7+y=-2
Solution:
Check:

y=-9

7+(-9)=-2  ,  -2=-2

Step-by-step explanation:

You want to isolate y by itself so you have to subtract 7 from both sides. -2-7=-9 so y=-9. To check this equation, you have to plug 9 back into the equation. It will look like 7+(-9)=-2. -2=-2 so that means that y=-9.

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f(x) has value 150 at x= 0

and 0 at x= 3

so d(f(x))/dt = slope = -150/3 = -50

$4034.40

the perimeter of the field is the sum of the lengths of the four sides:

47 yd + 158 yd + 47 yd + 158 yd = 410 yd

the cost of 3 ft (1 yd) of fence is 3×$3.28 = $9.84.

so the cost of jake's wood perimeter fance is

(410 yd) × ($9.84 /yd) = $4034.40