Solve the problem.The position of a body moving on a coordinate line is given by 
with s in meters and t in seconds. When, if ever, during the interval 
does the body change direction?
A. t = 3.5 sec
B. t = 7 sec
C. no change in direction
D. t = 14 sec
Answer: A
Mathematics
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Find the composition. If f(x) = 2x2 - 6x and g(x) = -4x, find (g ? f)(x)
A. -8x2 + 24x B. -8x3 + 24x2 C. 2x2 - 12 D. 32x2 - 6x
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Collect like terms.15a4 - 9a4 + 11a3 + 11a4 - 2a3
A. 26a4 B. 17a4 + 9a3 C. 26a7 D. Can't be simplified
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Write an algebraic expression, using x as the variable.A number divided by 5
A. 5x
B. 
C. x - 5
D. 
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