An electrician earns 100 dollars for a project installing light fixtures. she must pay for the light fixtures herself and they cost 2 dollars and 50 cents each at the hardware store. create an equation to represent her profit from the project. let x represent the number of light fixtures and y represent her total profit (the amount of money she has left over after paying for the light fixtures).

x = -3

y = -18

step-by-step explanation:

to solve by substitution, substitute one variable and solve for the other. then substitute again to find the remaining variable.

x-1/3(3x-9) = -3 since y=3x-9 substittute y.

x-1/3(3x-9)=-3

x + x +3 = -3

2x+3=-3

2x+3-3= -3-3

2x=-6

x=-3

substitute again into y=3x-9

y=3(-3)-9

y=-9-9

y=-18

1) 2/5

2) zero=0/1

3) zero=0/2

4) -4/5

5) undefined=3/0

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step-by-step explanation:

b

step-by-step explanation: