Multiply and simplify. Assume that all variables represent nonnegative numbers.4
(
+ 
)
A. 4
+ 7
B. 4
+ 28
C. 4
+ 7
D. 28
+ 28
Answer: B
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What are two lines in the same plane called?
A. perpendicular B. intersecting C. transversal D. coplanar E. parallel
Perform the indicated operation. Write the result in standard form.(8 + 4i) - (1 + 5i) + (8 + 8i)
A. 17 + 17i B. -15 - 9i C. 15 + 17i D. 15 + 7i
Solve each system of equations using matrices (row operations). If the system has no solution, say that it is inconsistent.
A. x = -7, y = 3, z = 14 B. x = 7, y = 3, z = 5 C. x = 7, y = 5, z = 3 D. Inconsistent
Use a graphing calculator to plot the data and find the quadratic function of best fit.A small manufacturing firm collected the following data on advertising expenditures (in thousands of dollars) and total revenue (in thousands of dollars). Find the quadratic function of best fit. Round values to the nearest thousandth. 
A. R(x) = -0.091x2 + 5.952x + 6337.167 B. R(x) = -0.0242x2 + 7.139x + 6209.323 C. R(x) = -0.015x2 + 4.536x + 6123.841 D. R(x) = -0.310x2 + 2.631x + 6128.455