I'm working on the same thing right now and I'm using every resource in my hands right now to find a solution. I will edit this post when I have more. If you need any more help I have completed the previous activity and most of this one.
EDIT:
Ok so I checked with somebody who is pretty good with math and they said that 5x=5x would be right. Not too sure but that's what I'm putting.
I put EVERYTHING for this assignment in comments down below. Geez all of this for 5 freakin points.
Answer:
$147
Step-by-step explanation:
378 / 18 = 21
1 hour of work = $21
7 hours of work = $21 * 7 = $147
Slope formula: y2-y1/x2-x1
= 12-5/3-2
= 7/1
= 7
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Best Regards,
Wolfyy :)