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Avery has a total of $12.50 in her piggy bank at home. Each week she takes out $1.25 to ride the city bus. Write an equation representing the balance, C, in the piggy bank, where w is the number of weeks.
A) C = 1.25w – 12.50
B) C = 1.25w + 12.50
C) C = –1.25w + 12.50
D) C = –1.25w – 12.50

Answer :

apologiabiology
amount now-bus=ballance
bus=number of weeks times how much taken out each time
12.5=amount now
bus=1.25w


C=12.50-1.25w
or
C=-1.25w+12.5

answer is C
carlosego

For this case we have a function of the form:

[tex]c (w) = mw + b[/tex]

Where,

  • b: initial amount
  • m: weekly rate of change
  • w: number of weeks
  • c: total balance

We have then that Avery has a total of $ 12.50 in her piggy bank at home:

[tex]b = 12.50[/tex]

Each week she takes out $ 1.25 to ride the city bus:

[tex]m = -1.25[/tex]

Substituting values we have:

[tex]c (w) = - 1.25w + 12.50[/tex]

Answer:

an equation representing the balance, C, in the piggy bank, where w is the number of weeks is:

[tex]c (w) = - 1.25w + 12.50[/tex]

Option C


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