Translate the problem to a system of equations, then solve using Cramer's Rule.Jerry has 3 pieces of string. The total length is 82 inches. The sum of the two longer pieces is 70. The middle piece is twice as long as the shortest piece. What are the lengths of the 3 pieces?
A. 6, 12, and 64 inches
B. 12, 24, and 46 inches
C. 12, 46, and 56 inches
D. No solution
Answer: B
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Solve the problem.If s varies directly as t2, and s = 72 when t = 3, find s when t is 4.
A. s = 96 B. s = 128 C. s = 24 D. s = 12
Solve and check the equation.-7x = 14
A. {-2} B. {-21} C. {1} D. {21}
Solve.The power that a resistor must dissipate is jointly proportional to the square of the current flowing through the resistor and the resistance of the resistor. If a resistor needs to dissipate 
of power when 
of current is flowing through the resistor whose resistance is 
find the power that a resistor needs to dissipate when 
of
current are flowing through a resistor whose resistance is 
A. 405 watts
B. 90 watts
C. 45 watts
D. 225 watts
Using the derivative of f(x) given below, determine the critical points of f(x).f'(x) = (x - 2) e-x
A. 3 B. 2 C. -3 D. -2