Solve the problem.Michael's bank contains only nickels, dimes, and quarters. There are 65 coins in all, valued at 
The number of nickels is 3 short of being three times the sum of the number of dimes and quarters together. How many dimes are in the bank?
A. 13 dimes
B. 48 dimes
C. 8 dimes
D. 9 dimes
Answer: C
Mathematics
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Subtract using columns.Subtract (4x9 - 9x8 - 2x7 + 2) from (9x9 - 5x8 + 4x7 - 4).
A. 5x9 - 14x8 + 2x7 - 2 B. 5x9 + 4x8 + 6x7 - 6 C. 13x9 - 14x8 + 2x7 - 6 D. 13x9 - 14x8 + 2x7 - 2
Mathematics
Find the required quantity given the wire that lies along the curve r and has density ?.Moment of inertia Iz about the z-axis, where r(t) = (5 cos t)i + (5 sin t)j, 0 ? t ? 
; 
A. Iz = 20
B. Iz = 0
C. Iz = 500
D. Iz = 500
Mathematics
Solve the problem.Find all values of k so that the given points are 
units apart. (-5, 5), (k, 0)
A. 3, 7 B. 7 C. -3, -7 D. -7
Mathematics
Use Cramer's rule to solve the linear system.2x + 2y = 322x - 3y = -13
A. (-7, -9) B. (7, 9) C. (-9, 7) D. (9, 7)
Mathematics