Divide.(5 + 5i) ÷ (8 - 7i)
A. 
- 
i
B. 
C. 
+ 
i
D. 5 - 5i
Answer: C
Mathematics
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Find the derivative.f(x) = 
A. 
B. 
C. 
D. 
Mathematics
Solve.y varies directly as x2. If y = 54 when x = 3, find y when x = 8.
A. y = 18 B. y = 24 C. y = 144 D. y = 384
Mathematics
Solve the problem.During one year, the Cheung's real estate bill included $286 for county services. Of this amount, $87 went to the highway department. What percent did the county highway department receive? (Round answer to two decimal places.)
A. 30.07% B. 69.58% C. 2488.20% D. 30.42%
Mathematics
Solve the system by the substitution method or the addition method. Identify a system with no solution or infinitely many solutions, using set notation to express the solution set.
A. {(1, 1)}
B. {(x, y) 
C. no solution or ?
D. {(-1.5, -1)}
Mathematics