Perform the operation indicated. Simplify.
+ 
A. 
B. 
C. - 
D. 
Answer: C
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Determine whether the variation between the indicated quantities is direct or inverse.The radius of a circle and its area.
A. Direct B. Inverse
Find the equation for the hyperbola described.Center at (0, 0); focus at (9, 0); vertex at (2, 0)
A. 
- 
= 1
B. 
- 
= 1
C. 
- 
= 1
D. 
- 
= 1
Solve the problem.After being struck with a hammer, a gong vibrates 66 vibrations in the first second and in each second thereafter makes 
as many vibrations as in the previous second. Find how many vibrations the gong makes before it stops vibrating.
A. 472 vibrations B. 77 vibrations C. 72 vibrations D. 462 vibrations
Solve the problem.A company produces two sizes of a dog house; large and small. If ? represents the number of large dog houses and s represents the number of small dog houses, then the polynomial 
describes the revenue from the sale of the two sizes of dog house. The polynomial 
describes the cost of producing the two sizes of dog house. If the company sells 40 large dog houses and 71 small dog houses in a month, what was the net profit or loss?
A. Net loss of $2370 B. Net loss of $370 C. Net profit of $370 D. Net profit of $2370