1. The manager of an apartment building needs an elec- D )y = 55x + 40
trician to repair the power generator for the building
. The table below shows the fixed amount for a time
service call and hourly charges for two different com-
panies . Which of the following equations gives the
total cost , y , of repairing the power generator in terms
of the total number of hours , x , from company A ?
A ) y = 48x + 75
B ) y = 75x + 48
C ) y = 40x + 55
D ) y = 55x + 40
2. For what number of hours , x , will the total cost of C) xe
5
repairing the generator for company B be less than or
equal to the total cost of repairing the laugh generator
for company A ?
A) xe
5/2
B) xd5/2
C) xe
5
D ) xd
5
3. Company B's total cost , y , is the fixed amount for a B) Hourly Rate
service call plus the hourly rates . If the relationship
between Company B's total cost , y , and the number
of hours , x , is graphed in the xy - plane , what does
the slope of the line represent ?
A) Fixed amount for a service call
B) Hourly Rate
C) Total amount for one day
D) Total amount for repairing the power generator
4. A) 480
, SAT TEST PRACTICE
Apex Car Rental company charges a flat fee of $ 40.00
per day plus $ 0.75 per mile to rent a car . Jason Car
Rental company charges a flat fee of $ 64.00 per day
plus $ 0.60 per mile to rent a car . If a car is rented
for three days , at how many miles would the rental
charges of the two companies be the same ?
A) 480
B) 450
C) 420
D) 380
5. It took Sara a total of 42 minutes to jog from home A ) 2.4 miles
to the park and back again , by the same path . If she
averaged 8 miles per hour going to the park and 6
miles per hour coming back , what is the distance from
her home to the park ?
A ) 2.4 miles
B ) 2.8 miles
C ) 3.2 miles
D ) 3.6 miles
6. Carl drove from his home to the average speed of 50 C ) x + y = 2
mph and along the same route at an average speed of 50x = 30y
beach at an returned home 30 mph . His total driving
time for the trip was 2 hours . Solving which of the
following systems of equations yields , x , the time it
took for Carl to drive to the beach and , y , the time
spent for the return trip ?
A ) x = y +2
50x = 30y
B)x+y=2
30x = 50y