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hi510hello
10.12.2020 •
Mathematics
Gabby and Sydney bought some pens and pencils. Gabby bought 4 pens and 5 pencils for $6.71. Sydney bought 5 pens and 3 pencils for $7.12. Find the cost of each. Enter your amount as a dollar amount. Pens cost $ Pencils cost $
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Ответ:
the pens cost and the pencil cost be $1.19 and $0.39 respectively
Step-by-step explanation:
The computation of the pens cost and the pencil cost is shown below:
Let us assume the cost of the pens be x
And the cost of the pencils be y
Now the equations would be
4x + 5y = $6.71(1)
5x + 3y = $7.12(ii)
Now multiply by 5 and 4 in equation 1 and 2
20x + 25y = $33.55
20x + 12y = $28.44
13y = $5.11
y = $0.39
Now put the y value in any equation
4x + 5(0.39) = $6.71
4x + $1.95 = $6.71
4x = $4.76
x = $1.19
Hence, the pens cost and the pencil cost be $1.19 and $0.39 respectively
Ответ:
C
Step-by-step explanation:
because all of then dont make sense at all only C