Write the expression in the standard form a + bi.If z = 4 + 6i and w = -5 + i, evaluate 
.
A. -1 + 7i
B. 9 - 5i
C. -9 - 5i
D. 9 + 5i
Answer: B
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Find the indicated vector.Let u = 
. Find 9u.
A. 
B. 
C. 
D. 
Solve the problem.Find the height of a moving box if its length is 30 in., its width is 33 in., and its surface area is 
Assume that the surface area includes the top of the moving box.
A. 13 in. B. 12,870 in. C. 33 in. D. 30 in.
What are the equations of Circle 1–Circle 5 on the template for Sam’s dartboard?
Sam is sketching a template on graph paper to use as a guide for his painted cork dart board. The diameter of Circle 1 is 2 feet and the distance between the edges of each of the next three pairs of circles is 1 foot.The distance between Circle 4 and Circle 5 is foot. Sam does not want axes through or touching his template and therefore wishes to sketch the dart board only in Quadrant I.At the closest points, he wants Circle 5 to be 1 unit from the y-axis and 1-unit from the x-axis. In this case:
Perform the indicated operation. Write the result in standard form.6i + (-9 - i)
A. 9 - 7i B. -9 + 5i C. -9 + 7i D. 9 - 5i