Solve.183 = 15x + 18
A. x = 150
B. x = 5
C. x = 154
D. x = 11
Answer: D
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Solve.x2 - 108 = 0
A. ±18
B. 18
C. ±6
D. 6
Fill in the blank with one of the words or phrases listed below. 
The number factor of a variable term is called the 
.
A. variable B. constant C. algebraic expression D. numerical coefficient
Solve the problem.The area of a circle varies directly as the square of the radius of the circle. If a circle with a radius of 
has an area of 78.5 square inches, what is the area of a circle with a radius of 18 inches?
A. 1019.76 in2 B. 1017.36 in2 C. 56.52 in2 D. 113.04 in2
Use the information in the table to solve the problem. Write your answer as a fraction in lowest terms.The table below shows the amounts of pollutants (in parts per million) in a sample of rainwater.
Find the ratio of pollutant E to pollutant C.
A. 
B. 
C. 
D. 