MustaphaP643635 MustaphaP643635

03-11-2022
Mathematics

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Notebook cost $2.50 and pens cost $0.75. The cost of n notebooks and p pens is 2.50n+0.75p.Find the cost2 notebooks and 4 pens3 notebooks and 5 pens

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AddileeO109260 AddileeO109260

03-11-2022

Cost =2.50n + 0.75 p

n= number of notebooks

p = number of pens

2 notebooks and 4 pens

Replace n =2 , p=4 and solve:

C = 2.50(2) + 0.75 (4) = 5 +3 = $8

3 notebooks and 5 pens

Same process

C = 2.50 (3) + 0.75 (5) = 7.5 + 3.75 = $11.25

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