Simplify. Assume all variables represent positive real numbers.
A. 
B. 
C. 
D. 
Answer: D
Mathematics
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Simplify, if possible, by combining like terms.9a + 7b + 4a
A. 13a + 7b B. 13a + 4b C. 13a + 7 D. 20ab
Mathematics
Evaluate the integral using the given substitution.
, u = 9 - s4
A. -4s3
+ C
B. 
C. -4
+ C
D. 
+ C
Mathematics
Factor completely. If the polynomial is prime, state so.81x2 - 144x + 64
A. (9x - 8)2 B. (9x + 8)2 C. (81x + 1)(x + 64) D. (9x - 8)(9x + 8)
Mathematics
Find the value of ? in the interval [0°, 360°) that satisfies the given conditions.sin ? = - 
and ? in quadrant III
A. 315° B. 45° C. 135° D. 225°
Mathematics