Use the formula for an to find the general term for the arithmetic sequence.a1 = -4, d = 

A. an = n - 
B. an =  + n
C. an = n - 
D. an = 4n - 


Answer: A

Mathematics

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Determine whether the following is a proportion. = 

A. Yes B. No

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Find the expected value.Mr. Cameron is sponsoring an summer concert. He estimates that he will make $300,000 if it does not rain and make $60,000 if it does rain. The weather bureau predicts the chance of rain is 0.34 for the day of the concert. What are Mr. Cameron's expected concert earning?

A. $300,000 B. $360,000 C. $60,000 D. $218,400

Mathematics

Solve the system by using the inverse of the coefficient matrix.-4x  - 2z = -42 2x + 6y - 6z = -18-6x - 7y = -64

A. (6, -4, -9) B. (7, 2, 9) C. (6, 4, 9) D. (4, 9, 4)

Mathematics

?Find the number of faces of a pyramid with an n-dimensional base.

A. ?n + 2 B. ?n + 1 C. ?n  D. ?n2 E. ?2n

Mathematics