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Vesna [10]
3 years ago
12

Mike bought 16 paperback books at the used book store for $10.95. Some cost $0.60 and some cost $0.75. How many of each did he b

uy?
Mathematics
1 answer:
serg [7]3 years ago
6 0
X=number of books that cost 0.60
y=number of books that cost 0.75

x+y=16
0.6x+0.75y=10.95

solve
multiply second equation by 10 for nicity
6x+7.5y=109.5

multiply first equesiotn by -6 and add to second

-6x-6y=-96
<u>6x+7.5y=109.5 +</u>
0x+1.5y=13.5

1.5y=13.5
divide both sides by 1.5
y=9

sub back
x+y=16
x+9=16
minus 6
x=7

seven 0.60 books and nine 0.75 books
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Step-by-step explanation:

Calculation:

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A = $4,066.00

The total amount accrued, principal plus interest, from simple interest on a principal of $4,000.00 at a rate of 5% per year for 0.33 years (120 days) is $4,066.00.

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3 years ago
Suppose the population of a town was 40,000 on January 1, 2010 and was 50,000 on January 1, 2015. Let P(t) be the population of
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Answer:

Given,

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Answer:

the first answer is correct Edge 2020

Step-by-step explanation:

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4 years ago
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