Solve.The amount of water used to take a shower is directly proportional to the amount of time that the shower is in use. A shower lasting 23 minutes requires 9.2 gallons of water. Find the amount of water used in a shower lasting 5 minutes.
A. 1.84 gallons
B. 12.5 gallons
C. 42.32 gallons
D. 2 gallons
Answer: D
Mathematics
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+ 
A. 
B. 
C. 
D. 
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Use a graphing calculator to solve the equation.32 - x2 = 4x
A. 4, -8 B. 4, 8 C. -8, -4 D. 8, -4
Mathematics
Ohm's Law for the current I in a circuit with voltage E, resistance R, capacitance reactance XC, and inductive reactance XLis 
Use this law to solve the problem.Find E if 
R = 3, XL= 8, and XC= 4.
A. 25i B. -57i C. 57i D. -25i
Mathematics
Solve the system of equations by the elimination method. Check your solutions. For any dependent equations, write your answer in ordered pair form.
A. ? B. {(0, 7)} C. {(0, 6)} D. {(-1, 7)}
Mathematics