Simplify. Write your answer in the form a + bi, where a and b are real numbers.(-5 + 4i) + (10 + 4i)
A. 5 + 12i
B. 5 + 8i
C. 10 + 8i
D. -5 + 8i
Answer: B
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Write the equation in standard form. Then identify the vertex of the parabola.x = -2y2 + 9y - 7
A. x = -2
2 + 
; 
B. x = -2
2 + 
; 
C. x = -2
2 + 
; 
D. x = 2
2 - 
; 
Find the perimeter of the figure.A concrete curb is to be built around a parking lot. How many meters of curbing will be needed?
A. 174 m B. 139 m C. 87 m D. 1820 m
Find the area of the geometric figure.
A. 14.8 sq mi B. 13.69 sq mi C. 7.4 sq mi D. 27.38 sq mi
Solve the problem.The time required for workers to produce each unit of a product decreases as the workers become more familiar with the production procedure. It is determined that the function for the learning process is 
where T(x) is the time, in hours, required to produce the xth unit. Find the time required for a new worker to produce units 10 through 16.
A. 32.83 hr B. -3.86 hr C. 12.14 hr D. 30.83 hr