Choose the graph of the equation.z = x2+ y2
A. 
B. 
C. 
D. 
Answer: C
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Perform the indicated operation. Simplify the answer when possible.
? 
A. 
B. 
C. 7
D. 2
Solve the problem.Bruce is a retired carpenter who builds patio chairs and dog houses, which he sells at his local flea market. It takes him 5 hours to build a dog house and 3 hours to build a patio chair. Bruce can work no more than 25 hours per week, and he must produce more chairs than dog houses. Write a system of inequalities to describe this situation. Use D for the number of dog houses and P for the number of patio chairs produced in a week.
A. 
B. 
C. 
D. 
Add. Write the answer in lowest terms.
+ 
+ 
A. 11
B. 1
C. 
D. 
Indicate whether the equation represents direct variation, inverse variation, or neither. If it is a variation equation, identify the constant of proportionality.y = 
A. neither B. direct variation: k = 0.5 C. inverse variation: k = 0.5 D. inverse variation: k = 5