Write the expression in the standard form a + bi.(4 + 8i)(4 - 8i)
A. 16 - 64i
B. 16 - 64i2
C. 80
D. -48
Answer: C
Mathematics
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Factor by grouping.8a3 - 20a2b + 10ab2 - 25b3
A. (8a2 + 5b2)(a - 5b) B. (4a2 + 5b)(2a - 5b) C. (4a2 - 5b2)(2a + 5b) D. (4a2 + 5b2)(2a - 5b)
Mathematics
Solve the problem.During the first five months of the year, Len earned commissions of $3810, $2330, $3380, $2310, and $3420. If Len must have average monthly earnings of at least $3130 in order to qualify for retirement benefits, what must he earn in the sixth month in order to qualify for benefits?
A. at least $3530 B. at least $3050 C. at least $3063 D. at least $3130
Mathematics
Add and subtract as indicated. Simplify and leave the numerator and denominator in your answer in factored form.
- 
A. 
B. 
C. 
D. 
Mathematics
Evaluate.
A. 118,030,185 B. 2,686,320 C. 1722 D. 68,880
Mathematics