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Slav-nsk [51]
4 years ago
13

Please Help ! Thank you

Mathematics
2 answers:
mel-nik [20]4 years ago
7 0
Maybe rate of change? Im not sure.

sladkih [1.3K]4 years ago
6 0
Im almost positive that it is rate of change

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3 years ago
Serena brought a total of 135 notebooks and pencils for her students. Each notebook cost 1.75 and each pencil cost 0.35. The tot
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Answer:

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Step-by-step explanation:

1. Set up variables

Pencils = p

notebooks= n

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3. Solve the system of equations (I'll use substitution)

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     b) Substitute the first equation into the second)

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     c) Solve!

    1.75n + 47.25 - 0.35n = 122.85

    1.4n = 75.6

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Serena bought 54 notebooks!

4. Substitute the number of notebooks into the first equation

p +n = 135

p + 54= 135

p = 81

Serena bought 81 pencils!!!

I hope this helps!!!!

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