Multiply and simplify. ? 

A. x3y7
B. x3y6
C. x3y4
D. x3y6

Answer: B

Mathematics

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Write the sum without sigma notation and evaluate it.

A. 2 cos ? + 2 cos  + 2 cos  + 2 cos  = 3 + 
B. 2 cos ? + 2 cos  + 2 cos  + 2 cos  = -2 +  + 
C. 2 cos ? + 2 cos  + 2 cos  + 2 cos  = -1 + 
D. 2 cos ? + 2 cos  = -2 + 

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Mathematics

Use the vertex and intercepts to sketch the graph of the quadratic function.f(x) = x2 + 8x + 7

A.

B.

C.

D.

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Mathematics

Rewrite the following fraction in two equivalent forms.- 

A. , - 
B. , 
C. , - 
D. - , 

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Mathematics

Multiply and simplify any radicals in your answer. Assume that all variables represent positive real numbers.  

A.
B. 15
C.
D.

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Mathematics