Perform the indicated operation. Write the answer in lowest terms.
+ 
A. 
B. 
C. 
D. 
Answer: B
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Factor completely.81x2 + 90xy + 25y2
A. (9x + 5y)2 B. (9x - 5y)2 C. (81x + 1)(x + 25) D. (9x + 5y)(9x - 5y)
Solve the problem.Find the center of mass of the upper half of a solid ball of radius 4 centered at the origin if the density at any point is proportional to the distance from that point to the 
A. (
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B. (
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C. (
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D. (
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The hyperbola shown in the calculator-generated graph was graphed in function mode with a square viewing window. What are the two functions y1 and y2 that were used to obtain the graph whose equation is given?
10
-10
A. y1 = 6
, y2 = -6
B. y1 = 
, y2 = - 
C. y1 = 
, y2 = - 
D. y1 = 
, y2 = - 
Solve the problem.The value of a certain make and model of used car can depend on several factors. The table gives data for the values of three Chevy Caprice station wagons. The value V is measured in dollars, where A is the age of the car in years, and C is the condition of the car rated on a scale of 1 to 10 (10 is excellent condition). src="https://sciemce.com/media/4/ppg__file0518192205__f1q76g3.jpg" style="vertical-align: -23.0px;" /> is 
The variables are found to be related by the equation 
Use the information given in the table to write a matrix equation which when solved will yield the values of a, b, and c. Then, using the fact that the inverse of the matrix 
, find c.
A. c = -200
B. c = -400
C. c = 400
D. c = 200