Answer:
Each pen costed $5.
Step-by-step explanation:
Simple, the coefficient (5) is the cost for one of the pens & the x is the amount of pens bought.
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Answer:
64 is the perfect square
Step-by-step explanation:
its the perfect square because the square root is 8 and 8 is a whole number therefore 64 is the perfect square here.
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Question 1:
4x+28
question 2:
18x-27
Yes because 18% is an abbysmal amount for a tip