Write the expression in the standard form a + bi.(-
+ i)6
A. 64i
B. -64
+ 64i
C. 64 - 64
i
D. -64
Answer: D
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Describe the situation with a linear inequality and then solve the inequality.ABC phone company charges $21 per month plus 
per minute of phone calls. XYZ phone company charges $17 per month plus 7¢ per minute of phone calls. How many minutes of phone calls should be made each month to make XYZ phone company a better deal?
A. less than 200 minutes B. more than 20 minutes C. more than 200 minutes D. less than 20 minutes
Solve the problem. Round to the nearest cent.An invoice for computer parts totals $586, including $4.21 for shipping and insurance. The terms are 3/10, n/45. If this invoice is paid within 10 days, how much is owed?
A. $568.42 B. $523.61 C. $581.79 D. $568.55
Divide.- 
÷ 
A. -1
B. 5
C. -5
D. - 
Given the radius, r, of a circle, find the diameter; or given the diameter, d, of a circle, find the radius.r = 22.1 yd
A. d = 44.2 yd B. d = 69.39 yd C. d = 11.05 yd D. d = 1533.61 yd