Simplify.-9 + 8 - 20
A. 3
B. 21
C. 19
D. -21
Answer: D
Mathematics
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Find the length of the curve.The circle r = 6 sin ?
A. 3? B. 36? C. 12? D. 6?
Mathematics
Factor.4a2 - b2
A. (2a - b)(2a + b) B. (2 - b)(2 + b) C. (2b - a)(2b + a) D. (2a - b)2
Mathematics
Find the derivative.r = 4 - ?4 cos ?
A. 
= - 4?3 cos ? + ?4 sin ?
B. 
= 4?3 sin ?
C. 
= 4?3 sin ? - ?4 cos ?
D. 
= 4?3 cos ? - ?4 sin ?
Mathematics
Solve the equation and check your solution.
- 
= 
A. -16 B. -10 C. -8 D. -14
Mathematics