Find the value of df-1/dx at x = f(a).f(x) = 4x + 6, a = 4
A. 
B. 
C. 4
D. 6
Answer: A
Mathematics
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Solve the system of equations using Gaussian elimination or Gauss-Jordan elimination.-6x - 7y = -24-4x + 4y = -16
A. (4, 1) B. (3, 1) C. (4, 0) D. No solution
Mathematics
Solve the problem. Assume that simple interest is being calculated in each case. Round your answer to the nearest cent.Robert Hall bought a new computer system. To pay for the system, he borrowed 
from the credit union at 3
% simple interest for 120 days. Find the interest owed. (Use a 365 day year.)
A. $61.60 B. $50.40 C. $187.37 D. $46.84
Mathematics
Provide an appropriate response.A 12 lb bag of dog food costs $5.10. Find the constant of direct variation.
A. $4.25 B. $5.10 C. $0.425 D. $6.90
Mathematics
Find the cube root.
A. 8 B. 16 C. -4, 4 D. 4
Mathematics