Determine whether the matrices are inverses. 
, 
A. No
B. Yes
Answer: B
Mathematics
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Rewrite without rational exponents, and simplify, if possible.(mn)1/7
A. 
B. 
C. 
D. (mn)-7
Mathematics
Solve the system of equations graphically using a graphing calculator. Find all values to the nearest tenth.y = 2x + 4xy = -2
A. x = 0.4, y = 4.8; x = -2.4, y = -0.8 B. x = 0.4, y = 4.8 C. x = -1.0, y = 2.0 D. No solution
Mathematics
Solve the problem.Suppose the cost per ton, y, to build an oil platform of x thousand tons is approximated by y = 
. What is the cost per ton for x = 300?
A. $214.29 B. $150.00 C. $64,285.71 D. $150,000.00
Mathematics
Solve the exponential equation.3(10 - 2x) = 81
A. 5 B. -3 C. 3 D. 27
Mathematics