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Helga [31]
2 years ago
7

Jonathan collects postcards and stamps. The number of postcards in his collection is 12 more than 3/4 the number of stamps. He h

as 39 postcards in all. If Jonathan has x stamps, which equation represents this situation and how many stamps does he have?
Mathematics
1 answer:
d1i1m1o1n [39]2 years ago
7 0

Answer:

12 +  \frac{3}{4} x = 39

\frac{3}{4} x = 27

x = 36

Jonathan has 36 stamps.

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vekshin1
<h3>Answer: $44.10</h3>

====================================================

Work Shown:

5% = 5/100 = 0.05

5% of 42 = 0.05*42 = 2.10

tax = $2.10

total cost including tax = $42 + $2.10 = $44.10

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An alternative is to multiply 42 by 1.05 to get

1.05*42 = 44.10

We get the same answer. The 1.05 refers to 1 + 0.05 where the "1" is 100% and the 0.05 is 5%, so the two combine to 105%, meaning the total cost is 105% of the cost before tax is considered.

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Step-by-step explanation:

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question 2

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