Solve the system by using Gaussian elimination with backward substitution or by reducing the matrix to reduced-row echelon form.-7x + 6y = -302x + 2y = -10
A. No solution
B. (0, -5)
C. (0, -4)
D. (-1, -4)
Answer: B
Mathematics
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Solve the problem.Find the amount of money in an account after 3 years if $2100 is deposited at 4% annual interest compounded semi-annually.
A. $2362.21 B. $2366.33 C. $2364.94 D. $2367.27
Mathematics
Use the fact that the trigonometric functions are periodic to find the exact value of the expression. Do not use a calculator.tan 
A. -1
B. 
C. 
D. 1
Mathematics
Graph the function.f(x) = 2.822x
A. 
B. 
C. 
D. 
Mathematics
Evaluate.
A. 13.5 B. -13.5 C. -9 D. 27
Mathematics