Find the sum.7 + 14 + 21 + ... + 770

A. 42350
B.
C. 42735
D. 41965

Answer: C

Mathematics

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Find the probability.Three fair coins are tossed. Find the probability of getting exactly two tails.

A.
B.
C.
D.

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Find A-1 if it exists.A = 

A.

B.

C.

D.

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Simplify.

A.  
B.  
C.
D.  

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Mathematics

Find the domain of the function of two variables.f(x, y) =  + 

A. {(x, y)| y ? 0 and y ? -1} B. {(x, y)| x ? 0 and y ? 1} C. {(x, y)| x ? 0 and y ? 0 and y ? 1} D. {(x, y)| y ? 0 and y ? 1}

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Mathematics