Pretty much you’re going to need to subtract the -9x to get it on the other side, so that you get y= 9x+6
Answer:
20%
Step-by-step explanation:
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F(5) = -2 * 5 + 1 = -9
the pair is (5, -9)
3t shirts cost $18
1 shirt will cost 18/3t = 6/t
7t shirts will then cost = (6/t)*7t = 42
7t shirts will cost $42.00