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Ksenya-84 [330]
3 years ago
8

Calvin bought 20 pencils at $0.45 each. How much change did he get from a $10 bill?

Mathematics
2 answers:
Yanka [14]3 years ago
7 0
He would have one dollar left
Oxana [17]3 years ago
6 0
20 x 0.45 = 9
10-9=1
Calvin got $1 in change
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In this item, we are not given with the figure but knowing that these lines ought to be perpendicular then we will be able to derive the relationship between the slopes of the line. 

The slopes of the perpendicular line are the negative reciprocals of one another. If we represent the slopes of the lines as m₁ and m₂, the relationship can be written in the form,
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We are given with one of the slopes. To determine the value of the second slope then,
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3 years ago
Pls instruct me on this.
Levart [38]

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Take out a from the left side:

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