Simplify by finding the absolute value.-?-6?
A. 0
B. 6
C. -6
D. 12
Answer: C
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Solve the problem.From a point on a river, two boats are driven in opposite directions, one at 9 miles per hour and the other at 5 miles per hour. In how many hours will they be 70 miles apart?
A. 10 hours B. 20 hours C. 14 hours D. 5 hours
Find zw or 
as specified. Leave your answer in polar form.z = 1 + iw = 
- iFind zw.
A. 
(cos 15° + i sin 15°)
B. 2
(cos 75° + i sin 75°)
C. 2
(cos 15° + i sin 15°)
D. 2
(cos 345° + i sin 345°)
Solve the system of equations.
- 
= -23
+ 
= 6
A. ?
B. 
C. 
D. 
The following table shows the earnings for the Juarez family last year. Use this information to answer the question.MonthEarningsMonthEarningsJan.$1400July$1300Feb.$1150Aug.$2450Mar.$2950Sept.$2500Apr.$2300Oct.$2000May$1650Nov.$2350June$2700Dec.$2400What was the family's total income from January thru June?
A. $11,000 B. $9,200 C. $12,150 D. $13,000