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Dominik [7]
3 years ago
15

Can someone tell what order of operations problem makes 13?

Mathematics
1 answer:
almond37 [142]3 years ago
8 0

Answer:

4 + (2 + 1)2 = 4 + (3)2 = 4 + 9 = 13

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Jason went to the post office and bought both 41-cent stamps and 26-cent postcards and spent $10.28. The number of stamps was 4
Charra [1.4K]
<h3>Jason bought 20 stamps of $0.41 each and 8 postcards of $0.26 each.</h3>

<em><u>Solution:</u></em>

Let stamps be s and postcards be p

Given that,

The number of stamps was 4 more than twice the number of postcards

s = 4 + 2p -------- eqn 1

Jason bought both 41-cent stamps and 26-cent postcards and spent $10.28

41 cent = $ 0.41

26 cent = $ 0.26

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s \times 0.41 + p \times 0.26 = 10.28

0.41s + 0.26p = 10.28 --------- eqn 2

Substitute eqn 1 in eqn 2

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1.08p = 10.28 - 1.64

1.08p = 8.64

Divide both sides by 1.08

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3 years ago
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