Write out the sum. Do not evaluate.
A. 6 + 7 + 8 + 9
B. 10 + 11 + 12 + 13
C. 7 + 8 + 9 + 10 + ...
D. 7 + 8 + 9 + 10
Answer: D
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Solve the problem.Best Rentals charges a daily fee plus a mileage fee for renting its cars. Barney was charged $90 for 3 days and 
, while Mary was charged $163 for 5 days and 
. What does Best Rental charge per day and per mile?
A. $18 per day; 14¢ per mile B. $13 per day; 17¢ per mile C. $17 per day; 13¢ per mile D. $16 per day; 14¢ per mile
Solve the equation for x.
?
?
?
A. 
, 
B. 
, 
C. 
, 
D. 
, 
E. 
, 
Solve.The current in a stream moves at a rate of 6 mph. If a boat travels 76 miles downstream in the same time that it takes to travel 38 miles upstream, what is the speed of the boat in still water?
A. 21 mph B. 18 mph C. 20 mph D. 12 mph
Calculate.
A. 6.7 B. 57 C. 5.7 D. 0.57