Find the sum of the first n terms of the arithmetic sequence.
?
4 + 7 + 10 + ... (to 20 terms)
?
A. 650
B. 680
C. 640
D. 610
E. none of the above
Answer: A
Mathematics
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For the given rectangular equation, write an equivalent polar equation. (x - 24)2 + (y + 3)2 = 576
A. r = 48 cos ? - 6 sin ? - 9 B. r2 = 48 r sin ? - 6r cos ? - 9 C. r2 = 48 r cos ? - 6r sin ? - 9 D. r2 = -24r cos ? + 3r sin ? + 576
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Sketch the line with the given slope and y-intercept.m = - 
, (0, 3)
A. 
B. 
C. 
D. 
Mathematics
Decompose v into two vectors v1 and v2, where v1 is parallel to w and v2 is orthogonal to w.v = 2i + 3j,
w = -2i + j
A. v1 = + 
i - 
j, v2 = 
i + 
j
B. v1 = + 
i - 
j, v2 = 
i + 
j
C. v1 = + 
i - 
j, v2 = 
i + 
j
D. v1 = + 
i - 
j, v2 = - 
i + 
j
Mathematics
Solve the equation by completing the square.49g2 + 42g - 40 = 0
A. 
, - 
B. - 
, - 
C. 
, - 
D. - 
, 
Mathematics