Solve the problem.What is the coefficient of x7y6 in the expansion of (x + y)13?
A. 8,648,640
B. 1,235,520
C. 7
D. 1716
Answer: D
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Solve the application and answer with a complete sentence.The perimeter of a rectangle is 56 inches. If the length is 18 inches, what is the width?
A. The width of the rectangle is 5 inches. B. The width of the rectangle is 20 inches. C. The width of the rectangle is 36 inches. D. The width of the rectangle is 10 inches.
Divide.(5m2 + 10m - 15) ÷ (m + 3)
A. m - 5
B. 5m - 5
C. 5m + 5
D. 5m - 5 + 
Solve the problem.The data below represent the average monthly cost of natural gas in an Oregon home. 
Above is the graph of 45.05 sin x superimposed over a scatter diagram of the data. Find the sinusoidal function of the form 
which best fits the data.
A. y = 45.05 sin 
+ 66.25
B. y = 45.05 sin 
+ 21.20
C. y = 45.05 sin 
+ 21.20
D. y = 45.05 sin 
+ 66.25
Perform the indicated operations and simplify the result. Leave the answer in factored form.
+ 
- 
A. 
B. 
C. 
D. 