SOLUTION: An on-site typing service's fee is made up of a fixed call-out charge and a charge depending on how long the job takes. The total charge for a 15-minute job is $29, a 40-minute job
Question 987602: An on-site typing service's fee is made up of a fixed call-out charge and a charge depending on how long the job takes. The total charge for a 15-minute job is $29, a 40-minute job $64 and a 1 1/2-hour job $134.
a)What is the charge for a job taking 80 minutes?
b)What does the technician charge as a call-out fee?
c)What is the charge for each minute of work? Answer by macston(5194) (Show Source):
You can put this solution on YOUR website! .
F=Fixed charge; M=time charge(per minute); T=number of minutes; C=Total charge
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C=F+M(T)
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$64=F+M(40min)
$29=F+M(15min) Subtract this from above.
$35=M(25min)
$1.40/min=M The per minute fee is $1.40 per minute.
Put $1.40 in the first equation and solve for F.
$64=F+$1.40(40)
$64=F+$56
$8=F The fixed call out charge is $8.
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A) For an 80 minute job:
C=F+M(T)
C=$8+80($1.40)
C=$8+$112
C=$120
ANSWER: An 80 minute job would cost $120.
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B). The call out fee (F) is $8.00.
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C). The per minute charge (M) is $1.40.
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