Perform the indicated operation. Write the answer in simplest form. If the answer is an improper fraction, write it as a mixed number.
A. 6
B. 14
C. 5
D. 6
Answer: C
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Solve the problem below by setting up and solving a system of two linear equations in two variables.A 13% salt solution is to be mixed with a 18% salt solution to produce 10 gallons of a 16% salt solution. How many gallons of the 13% solution and how many gallons of the 18% solution will be needed?
A. 3 gallons of 13% and 5 gallons of 18% B. 8 gallons of 13% and 10 gallons of 18% C. 16 gallons of 13% and 18 gallons of 18% D. 4 gallons of 13% and 6 gallons of 18% E. 18 gallons of 13% and 20 gallons of 18%
Find the area of the specified region.Inside the circle r = 5 and to the right of the line r = 
sec ?
A. 
(4? - 3
)
B. 
(2? + 3
)
C. 
(2? - 3
)
D. 
?
Solve the inequality. Express your answer using interval notation. Graph the solution set.-21 ? -3x - 3 ? -12
A. [-6, -3]
B. (3, 6)
C. [3, 6]
D. (-6, -3)
Find the volume.Find the volume of a cone with height 2 centimeters and diameter 9 centimeters. Use 3.14 as an approximation for ?. Round to the nearest whole number.
A. 254 cm3 B. 170 cm3 C. 42 cm3 D. 38 cm3