Combine like terms.5.5x - 1.2y - 3.2x + 7y + 2.6x
A. 4.9x + 5.8y
B. 4.9x - 1.2y + 7
C. 4.9x + 8.2y
D. 11.3x + 5.8y
Answer: A
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Solve the problem.A window is in the form of a rectangle surmounted by a semicircle. The rectangle is of clear glass, whereas the semicircle is of tinted glass that transmits only one-fifth as much light per unit area as clear glass does. The total perimeter is fixed. Find the proportions of the window that will admit the most light. Neglect the thickness of the frame.
A. 
= 
B. 
= 
C. 
= 
D. 
= 
Find the general term of the arithmetic sequence.6.9, 7.7, 8.5, 9.3, 10.1, . . .
A. an = 0.8n + 5.9 B. an = 0.8n + 6.1 C. an = 0.8n + 6.9 D. an = 0.7n + 6.1
Find the sum.
A. 7.9 B. 6.8 C. 6.9 D. 7.8
Find the maximum or minimum value of the given objective function of a linear programming problem. The figure illustrates the graph of feasible points. 
Objective Function: z = x + 6yFind maximum.
A. maximum: 21 B. maximum: 26 C. maximum: 16 D. maximum: 32