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
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Determine whether the following is a proportion.
= 
A. Yes B. No
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
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)
?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