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For $7.90 you purchased 8 total items ( pens and highlighters) from a local bookstore. Each highlighter cost $1.09 and each pen cost $.68.Write a system of equations that can be used to find how many of each you bought


a) 8p+8h=7.90 and 1.09 + .68 = 7.90

b) h+p=8 and .68 + 1.09p=7.90

c) p+h= 7.90 and .68 + 1.09h=8

d) h+p =8 and 1.09 + .68p = 7.90

Respuesta :

Answer:

p=number of pens

h=number of highlighters


p+h=8


1.09h+0.69p=752



p+h=8

minus h from both sides

p=8-h


sub that for p


1.09h+0.69(8-h)=7.52

1.09h+5.52-0.69h=7.52

0.4h+5.52=7.52

minus 5.52 from both sides

0.4h=2

divide both sides by 0.4

h=5


sub back


h=8-p

5=8-p

minus 8 frm both sides

-3=-p

mltiply both sides by -1

3=p




3 pens you bought





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