Add or subtract.(6 + 4i) - (-4 + i)
A. 2 + 5i
B. -10 - 3i
C. 10 + 3i
D. 10 - 3i
Answer: C
Mathematics
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Write the expression in terms of sine and cosine, and simplify so that no quotients appear in the final expression.
A. -cos x B. -sin x C. sin x D. cos x
Mathematics
Add or subtract by first simplifying each radical and then combining any like radical terms. Assume that all variables represent positive real numbers.
+ 10
- 4
A. 36
B. 32
C. 32
- 4
D. -72
Mathematics
Simplify.
2? 
A. 
B. 
C. 
D. 
Mathematics
Find the equation of the parabola corresponding to the given information.The parabola has focus ( 0 , 1 ) and directrix y = -1.
A. y = 
x2
B. y = x2
C. y = - 
x2
D. x = 
y2
Mathematics