Solve the system by the addition method. x + 6y = 114x + 5y = -13
A. {(-7, 3)}
B. {(7, 4)}
C. {(-8, 4)}
D. ?
Answer: A
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Differentiate the power series for 
at 
to obtain a series representation for the function 
middle;" data-wiris-created="true" varid="variable_id_field" variablename="impvar_94e0a8600e1f449baa18eb905" />.
What will be an ideal response?
Multiply.(7x + 6y)2
A. 49x2 + 36y2 B. 49x2 + 84xy + 36y2 C. 7x2 + 84xy + 36y2 D. 7x2 + 36y2
Solve the problem.The following data represents the normal monthly precipitation 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?
Write the function in the form 
or 
. Find the period and phase shift.y = 5 cos (?x - 6)
A. y = 5 cos
period = 5; phase shift = - 
B. y = 5 cos
period = 2; phase shift = 6
C. y = 5 cos
period = ?; phase shift = 6
D. y = 5 cos
period = 2; phase shift = 