Use graphing calculator to find the inverse of the matrix. Give 5 decimal places.A = 
A. 
B. 
C. 
D. 
Answer: C
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Determine whether the given expression is a monomial (Yes or No). For those that are monomials, state the coefficient and degree.
A. yes; coefficient 
; degree 4
B. yes; coefficient 
; degree 3
C. no
D. yes; coefficient 3; degree 
Find the hours, rate, or earnings as specified.
Find the gross earnings for the week. Overtime hours are any hours over 40.
A. $831.60 B. $1134.00 C. $1058.40 D. $756.00
Solve the problem using matrices.The figure below shows the intersection of three one-way streets. To keep traffic moving, the number of cars per minute entering an intersection must equal the number of cars leaving that intersection. Set up a system of equations that keeps traffic moving, and use Gaussian elimination to solve the system. If construction limits z to t cars per minute, how many cars per minute must pass through the other intersections to keep traffic moving?
A. t + 1 cars/min between I2 and I1; t + 4 cars/min between I1 and I3 B. t + 2 cars/min between I2 and I1; t - 3 cars/min between I1 and I3 C. t + 8 cars/min between I2 and I1; t + 3 cars/min between I1 and I3 D. t - 2 cars/min between I2 and I1; t + 1 cars/min between I1 and I3
Find the derivative.f(x) = 2x2 - 4x + 2
A. 2x - 4 B. 4x - 4 C. 2x2 - 4 D. 4x2 - 4