Solve the equation. If the equation is an identity or a contradiction, state this.1.2x + 4.1 = 0.4x - 1.9
A. x = -7.6
B. x = -8.25
C. x = 0.133
D. x = -7.5
Answer: D
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Solve the problem.The position (in centimeters) of an object oscillating up and down at the end of a spring is given by 
at time t (in seconds). The value of A is the amplitude of the motion, k is a measure of the stiffness of the spring, and m is the mass of the object. How fast is the object moving when it is moving fastest?
A. 
cm/sec
B. A cm/sec
C. A
cm/sec
D. A
cm/sec
Evaluate the numerical value of the formula with the given replacement values.P = 2 ? (L + W)
L = 3, W = 5
A. P = 8 B. P = 30 C. L = 16 D. P = 16
Find the indicated matrix.Let A = 
and B = 
. Find AB.
A. 
B. 
C. 
D. 
Solve the problem.The time T necessary to make an enlargement of a photo negative varies directly as the area A of the enlargement. If 24 seconds are required to make a 3-by-4 enlargement, find the time required for a enlargement.
A. 90 sec B. 30 sec C. 60 sec D. 120 sec