Perform the indicated operation. Write the result in the form a + bi.(3 + 
) (5 + 
)
A. 15 + 
- 25¡
B. 15 - 
+ 3¡
+ 5¡ 
C. 5 - 8¡
D. 25 + 80i
Answer: B
Mathematics
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Solve the differential equation.
= 4 cos x sec y
A. y = sin (4 sin x + C) B. y = 4 sin x + C C. y = sin-1 (4 sin x + C) D. y = sin-1 (4 cos x + C)
Mathematics
Find the indicated root, or state that the expression is not a real number.
A. -
B. 5
C. -5
D. not a real number
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Solve the problem.The total length of a boat race is 
of a mile. Kira has completed 
of a mile. How much does she have left to complete?
A. 
mi
B. 
mi
C. 
mi
D. 
mi
Mathematics
Identify the center and radius of the circle 
.
A. center: 
radius: 4
B. center: 
radius: 
C. center: 
radius: 
D. center: 
radius: 
E. center: 
radius: 
Mathematics