Graph the function. Show at least one period.y = -3 cos(x - ?)
A. 
B. 
C. 
D. 
Answer: C
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Multiply and simplify any radicals in your answer. Assume that all variables represent positive real numbers.(3x
)(5x
)
A. 105x
B. 90x2
C. 105x2
D. 90x3
Solve.Express the perimeter of the rectangle as a fully simplified rational expression.
A. 
in.
B. 6x in.
C. 6 in.
D. 12 in.
Write the expression in the standard form a + bi.(3 - 9i) + (5 + 5i)
A. 8 + 4i B. 8 - 4i C. -8 + 4i D. -2 + 14i
Solve the problem.The paired data below consist of the costs of advertising (in thousands of dollars) and the number of products sold (in thousands). By using linear regression, the following function is obtained: 
where x is the cost of advertising (in thousands of dollars) and y is number of products sold (in thousands). Use this function to predict the number of products sold if the cost of advertising is $15,000.
A. 97.65 B. 94.65 C. 41,905.8 D. 104.35