Rewrite the subtraction problem as an addition problem.(+18) - (-27)
A. (+18) - (+27)
B. (+18) + (-27)
C. (+18) + (+27)
D. None of the above
Answer: C
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Use the graph to find a ? > 0 such that for all x, 0 < 
< ? ? 
< ?.
A. 0.27 B. 0.24 C. 0.51 D. 2
Find -x.x = 29
A. -29
B. 29
C. 0
D. 
Simplify the square root. Assume all variables represent nonnegative real numbers.
A. 5k7q8 
B. 5k3q4 
C. 5q4 
D. 5k3q4 
Solve the problem.Daniel decides to feed his cat a combination of two foods: Max Cat and Mighty Cat. He wants his cat to receive four nutritional factors each month. The amounts of these factors (a, b, c, and d) contained in one bag of each food are shown in the chart, together with the total amounts needed. 
The costs per bag are $40 for Max Cat and $35 for Mighty Cat. How many bags of each food should be blended to meet the nutritional requirements at the lowest cost? What is the minimum cost?
A. Minimum cost = $700 when he blends 0 bags of Max Cat and 20 bags of Mighty Cat.
B. Minimum cost = $610 when he blends 3 bags of Max Cat and 14 bags of Mighty Cat.
C. Minimum cost = $541.25 when he blends 
bags of Max Cat and 
bags of Mighty Cat.
D. Minimum cost = $500 when he blends 
bags of Max Cat and 
bags of Mighty Cat.