Find 
by using the Chain Rule. Express your final answer in w = xy2; x = t + s, y = st2
A. 4s2t4 + 5s3t3
B. 5s2t4 + 4s3t3
C. 5s2t3 + 4s3t4
D. 5s3t4 + 4s2t3
Answer: B
Mathematics
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Write the improper fraction as a mixed number or an integer.
A. 
B. 57
C. 8
D. 55
Mathematics
Find the center and the radius of the circle.x2 + y2 + 4x + 16y = -43
A. (8, 2); r = 25 B. (2, 8); r = 25 C. (-2, -8); r = 5 D. (-8, -2); r = 5
Mathematics
Factor the polynomial.x2 + 49
A. (x - 7)2 B. (x + 7)2 C. (x + 7)(x - 7) D. prime
Mathematics
Add or subtract, if possible. Assume that all variables represent non-negative values. Simplify your answer. -2
+ 5
- 
- 5
A. 21
+ 5
B. -21
+ 5
C. 21
- 5
D. -21
- 5
Mathematics