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TEA [102]
3 years ago
5

Brock is a plumber. He charges a flat rate of $40 to visit a house to inspect it's plumbing. He charges an additional $20 for ev

ery hour he spends inspecting or making repairs.
Which graph below correctly shows the price of using Brock's plumbing service vs time?

Mathematics
2 answers:
Taya2010 [7]3 years ago
8 0

W is correct. the red line starts at 40 which is the initial fee

 then it crosses 60 and 1.0 and 80 at 2.0 which is 20 dollars for 1 hour

erik [133]3 years ago
7 0
It would be graph W because the cost will increase, so that gets rid of Y... It has to start at 40 for the original cost, getting rid of Z and X
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Sunny_sXe [5.5K]

Answer:

\large \boxed{x = -1,\, y = -4 \text{ or } (-1, -4)}

Step-by-step explanation:

ƒ(x):

-x + y = -3

For easier calculations, add x to each side. Then

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x =  1:  y = -3 + 1                = -2

x = 0:  y = -3 + 0               = -3

x = -1: y =  -3 + (-1) = -3 - 1 = -4

g(x):

-6x + y = 2

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x = 0: y = 2 + 0(1)              =  2

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\begin{array}{ccc}\mathbf{x}& \mathbf{f(x)}& \mathbf{g(x)}\\\mathbf{1} & -2 & 8\\\mathbf{0} & -3 & 2\\\mathbf{-1} & -4 & -4\\\end{array}\\\text{The table shows that f(x) = g(x) = -4 when x = -1.}\\\text{The solution to both equations is $\large \boxed{\mathbf{x = -1,\, y = -4} \text{ or } \mathbf{(-1, -4)}}$}

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3 years ago
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