Use the Gauss-Jordan method to solve the system of equations. If the system has infinitely many solutions, give the solution with y arbitrary. 7x + 7y = -42-4x - 4y = 24
A. {(-6, 1)}
B. ?
C. {(-6, 0)}
D. {(-7, 1)}
Answer: C
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Solve the problem.A car rental company has two rental rates. Rate 1 is $63 per day plus $.18 per mile. Rate 2 is $126 per day plus $.09 per mile. If you plan to rent for one week, how many miles would you need to drive to pay less by taking Rate 2?
A. more than 17,150 miles B. more than 4900 miles C. more than 9800 miles D. more than 5000 miles
Provide an appropriate response.The two triangles shown below are congruent. The vertices corresponding to H, I, and J (in order) are 
.
A. K, M, and L B. L, K, and M C. M, K, and L D. K, L, and M
Perform the indicated operation. Assume that all variables are nonnegative.(4 + 7
)2
A. 16 + 56
+ 49n
B. 16 + 49n
C. 16 - 49n
D. 16 - 56
+ 49n
Simplify the expression using the product and quotient properties of square roots. Assume that any variables represent positive real numbers.
A. x3yz2 
B. x3yz2 
C. xyz 
D. x15y5z10 