Find the fifth term and the nth term of the geometric sequence whose initial term, a, and common ratio, r, are given.a = 
; r = 
A. a5 = 5
, an = 5n/2-1
B. a5 = 3125, an = 5n
C. a5 = 625
, an = 5n-1/2
D. a5 = 25
, an = 5n/2
Answer: D
Mathematics
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Solve the system using the inverse of the coefficient matrix of the equivalent matrix equation. 9x - y + 4z = 20 2x + 4y + 3z = 15 4x - 9y + z = -9
A. {(-2, 2, 4)} B. ? C. {(2, 1, 2)} D. {(2, 2, 1)}
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If possible, evaluate the expression by hand. If not, approximate the answer to the nearest hundredth.
-4
A. 
B. - 
C. - 
D. 
Mathematics
Graph the hyperbola.
- 
= 1
A. 
B. 
C. 
D. 
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Solve the problem.Walt made an extra $9000 last year from a part-time job. He invested part of the money at 10% and the rest at 8%. He made a total of $840 in interest. How much was invested at 8%?
A. $3000 B. $6000 C. $7000 D. $4500
Mathematics