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Margie babysits for two families. Mr. and Mrs. Smith pay her $6.50 an hour to babysit their son, Shea. Mr. and Mrs. Jones pay Margie $8 an hour to babysit their children, Sarah, Susan, and Dawn.

A Use the variable x for the number of hours Margie babysits for the Smith family. Write an expression to represent the amount she earns babysitting for this family.

B How much would Margie earn babysitting for the Smith family for 7 hours?

C When babysitting for the Smith family, how long would it take Margie to earn $78?

Respuesta :

Answer:

A) [tex]\$ 6.5\timesx[/tex] is the expression to represent total amount of money she earns babysitting for Smith family.

B) [tex]\$45.5[/tex] she will earn for Smith family for 7 hours

C) It would take [tex]12 \ hrs[/tex] for Margie to make [tex]\$78[/tex] when babysitting for the Smith family

Step-by-step explanation:

Given.

Mr. and Mrs. Smith pay Margie [tex]\$6.50[/tex] an hour to babysit their son, Shea.

Mr. and Mrs. Jones pay Margie $8 an hour to babysit their children, Sarah, Susan, and Dawn.

Let x be number of hours.

Solving for Part A.

Amount of Money earn from Smith family = Pay per hour [tex]\times[/tex] Number of hours =[tex]\$ 6.5 \times x= \$ 6.5x[/tex]

Solving for Part B.

x=7

Margie earns from smith family for 7 hours = [tex]\$ 6.5x=\$6.5\times7=\$45.5[/tex]

Solving for part C.

Margie earned = [tex]\$ 78[/tex]

To find number of hours

No of hour Margie has done babysitting for Smith family [tex]x=\frac{\$78}{\$6.5}=12 \ hrs[/tex]