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Ms. Dunn spent $10.70 to buy a total of 24 slices of pie or cookies. A slice of pie costs $0.80 and a cookie costs $0.30. How many slices of pie did Ms. Dunn buy?


a. 7

b. 12

c. 17

d. 10

Respuesta :

Answer:(a)

Step-by-step explanation:

Given

Ms. Dunn spent [tex]\$ 10.70[/tex] to 24 slice of pie or cookie

A pie cost [tex]\$ 0.80[/tex]

and Cookie cost [tex]\$ 0.30[/tex]

Suppose Dunn buy x pie and y cookie

So [tex]10.70=x\times 0.8+y\times 0.3[/tex]

and [tex]x+y=24[/tex]

Solving above two equations we get

[tex]x=7[/tex] and [tex]y=17[/tex]

So Ms. Dunn buy 7 piece of pie

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