Simplify the rational expression. If the rational expression cannot be simplified, so state.
A. 
B. - 
C. 
D. 
Answer: A
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If r(t) is the position vector of a particle in the plane at time t, find the indicated vector.Find the acceleration vector.r(t) = (4 cos t)i + (3 sin t)j
A. a = (4 cos t)i + (3 sin t)j B. a = (-4 sin t)i + (-3 cos t)j C. a = (-4 cos t)i + (-3 sin t)j D. a = (4 sin t)i + (3 cos t)j
Use Pascal's triangle to expand the binomial.(x - 5y)5
A. x5 - 25x4y + 500x3y2 - 2500x2y3 + 3125xy4 - 5y5 B. x5 - 25x4y + 250x3y2 - 1250x2y3 + 3125xy4 - 3125 C. x5 - 25x4y + 500x3y2 - 2500x2y3 + 3125xy4 - 3125y5 D. x5 - 25x4y + 250x3y2 - 1250x2y3 + 3125xy4 - 3125y5
Find the slope and y-intercept of the line.-x + 8y = 88
A. slope = -1; y-intercept = 88
B. slope = 8; y-intercept = -88
C. slope = - 
; y-intercept = 11
D. slope = 
; y-intercept = 11
Rationalize the denominator. Assume all variables represent positive real numbers.
A. 22
B. 
C. 1
D. 22