Evaluate the expression for the given value or values of the variables.
; x = 9, y = 10
A. 35
B. 32
C. 70
D. 75
Answer: A
Mathematics
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Factor completely.y2 - 36
A. (y + 36)(y - 36) B. (y2 + 6)(y2 - 6) C. (y - 6)(y - 6) D. (y + 6)(y - 6)
Mathematics
Find the curvature of the space curve.r(t) = 
(1 + t)3/2i +
(1 - t)3/2j + 
tk
A. ? = 
B. ? = 
C. ? = 
D. ? = 
Mathematics
Use the fundamental identities to simplify the expression.1 - cos2 ?
A. sin ? B. - sin2 ? C. tan2 ? D. sin2 ?
Mathematics
Solve the problem.How many ways can a class president, a class secretary, and a class treasurer be chosen from a group of 8 candidates?
A. 24 B. 1680 C. 336 D. 21
Mathematics