Evaluate the function.If r(x) = 
, find r
+ r(-10).
A. - 
B. 15
C. - 
D. 12
Answer: A
Mathematics
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Solve the problem.The area of a triangle is 12x3 - 12x2 - 50x. Find a polynomial that expresses the length of the base if the height is x.
A. 24x3 - 24x2 - 100x B. 6x3 - 6x2 - 25x C. 24x2 - 24x - 100 D. 12x2 - 12x - 50
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Factor out the greatest common factor.20y4 + 14y3 - 20y2 - 2y
A. 2y2(10y2 + 7y - 10) B. 2y(10y3 + 7y2 + 10y - 1) C. 2(10y4 + 7y3 - 10y2 - y) D. 2y(10y3 + 7y2 - 10y - 1)
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Use special right triangles to evaluate the expression.cos 
A. 
B. 
C. 
D. 
Mathematics
Solve the problem.Write an expression for the area of the figure shown. Then simplify the expression. All measures arein inches. 
A. 68 sq in.
B. 4
sq in.
C. 98 sq in.
D. 140 + 12
sq in.
Mathematics