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Who can help me with number 15 and 16

Who can help me with number 15 and 16-example-1
User Doctor Dan
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15. The expression could be expanded to the terms below.

.87b + .87b + .87b + .87b + .87b + .87b

You could also leave each of those at (b - .13b) if they prefer. Each of them would show the cost of one discounted loaf of bread.

16. The gardener added the side lengths rather than multiplying them.
User Mattias Lindberg
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