Perform the indicated operations: (- 11x) – (- 5y) - 7x + - 3y.
a. -18x + 2y
b. -18x - 8y
c. -4x + 2y
d. 4x - 2y
a. -18x + 2y
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The graph shows the monthly revenue in millions of dollars of a growing company after the company doubled its advertising. Use the graph to solve the problem. 
Estimate the minimum revenue during the period of time plotted on the graph.
A. $6 million B. $4 million C. $1 million D. $2 million
Find the area of the triangle. If necessary, round the answer to two decimal places.? = 20°, b = 13, c = 4
A. 6.89 B. 24.43 C. 26.43 D. 8.89
Factor completely. If the polynomial cannot be factored, write "prime."64x2 - 196
A. 4(4x + 7)(4x - 7) B. (4x + 7)(16x - 28) C. 4(4x - 7)2 D. (16x + 28)(4x - 7)
Find all numbers that must be excluded from the domain of the rational expression.
A. x ? 
B. x ? 4
C. x ? 16
D. x ? 4, x ? -4