The equation must equal 84, so you can eliminate B and D.
Chin charges a rate for 2 hours, then charges a reduced rate for 4 hours. There are no discounts present in his rate, so you can eliminate A.
The equation for Chin's charges can be found by the equation C. 2x + 4y = 84.
4.0081 x 10 to the 4th power. I know because I did this one.
Answer:
(B) i think
Step-by-step explanation:
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