Find the sum of the first n terms of the following arithmetic sequence.a1 = -14, d = -5; n = 4.
A. -34
B. -86
C. -56
D. -14
Answer: B
Mathematics
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Graph the function f(x) over the given interval. Partition the interval into 4 subintervals of equal length. Then add to your sketch the rectangles associated with the Riemann sum 
, using the indicated point in the kth subinterval for ck.f(x) = cos x + 3, [0, 2?], right-hand endpoint
A. 
B. 
C. 
D. 
Mathematics
Solve the equation.
+ 5 = 
A. 
B. 
C. 
D. 
Mathematics
Find the coordinates of the vertex of the parabola.x = 5y2 - 40y + 82
A. (4, 0) B. (0, 2) C. (4, 2) D. (2, 4)
Mathematics
Perform the indicated operation. Assume that all variables are nonnegative.7
- 5
- 7
A. 354
B. 36
C. 7
D. -354
Mathematics