Factor completely.x2 + 3xy - 10y2
A. (x - y)(x + 2y)
B. (x + 5y)(x - 2y)
C. (x - 5y)(x + y)
D. (x - 5y)(x + 2y)
Answer: B
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Solve the problem.The following data represents the average monthly minimum temperature for a certain city in California. 
Draw a scatter diagram of the data for one period. Find a sinusoidal function of the form 
that fits the data. Draw the sinusoidal function on the scatter diagram. Use a graphing utility to find the sinusoidal function of best fit. Draw the sinusoidal function of best fit on the scatter diagram.
What will be an ideal response?
Use a sum or difference identity to find the exact value.tan 
A. 2 - 
B. 2 + 
C. -2 - 
D. -2 + 
Perform the operation and reduce to lowest terms.
÷ 
A. 
B. 
C. 4
D. 
Round the amount to the nearest dollar.$127.59
A. $128 B. $127 C. $127.50 D. $126.59