Find the value of the expression using the given values.-15x + yx = 5, y = -1
A. 74
B. 4
C. -16
D. -76
Answer: D
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Solve by the substitution method. If the system is inconsistent or dependent, say so. x - 7y = 282x - 6y = 24
A. (0, -4) B. (4, 0) C. (1, -5) D. No solution
Find the standard deviation s for the given data. Round your answer to one more decimal place than the original data.The normal monthly precipitation (in inches) for August is listed for 12 different U.S. cities.3.51.62.43.74.13.91.03.64.23.43.72.2Compute the standard deviation.
A. 1.09 B. 1.05 C. 12.03 D. 1.00
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?
Graph the function. Show at least one period.y = 2 sin(?x + 5)
A. 
B. 
C. 
D. 