Solve the system using elimination.
A. (2.4, 11)
B. (3, 5)
C. (2.4, 5.6)
D. (3, 11)
Answer: B
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Solve the problem, if possible. Round your answer to the nearest tenth, when appropriate.Doris has a fish pond 15 ft by 18 ft. She wants to put grass in a strip of uniform width around the pond. She has enough grass seed for 234 ft2. How wide will the strip be?
A. 1.5 ft B. 12 ft C. 9 ft D. 3 ft
Solve the problem.The following test scores were recorded for a student: 77, 74, 72, 71, 80, 76. Find the mean, median, and mode.
A.
| mean: 75 | median: 71 | mode: 80 |
B.
| mean: 76 | median: none | mode: 80 |
C.
| mean: 75 | median: 75 | mode: none |
D.
| mean: 74 | median: none | mode: none |
Solve the problem.The total resistance R due to two resistances connected in parallel is given by: R = 
.Use partial-fraction decomposition to write 
in terms of partial fractions.
A. 
= 
+ 
B. 
= 
+ 
C. 
= 
+ 
D. 
= 
+ 
John cares about environment and decided to change his car from gasoline to electric. Moreover, electric cars are more fuel-efficient. His old gasoline car needed 6.4 gallons of gasoline per 100 mile, and a new electric car will need 30 kilowatt-hours (kWh) for the same distance. Evaluate John’s profit during the first year of exploitation of the electric car if electricity costs $0.23 per kWh and gasoline costs $4.81 per gallon. John has driven 1,400 miles.
a. $527.576 b. $64.12 c. $33,437.6 d. $334.376