Solve the problem.Assume that the price per unit d of a certain item to the consumer is given by the equation 
where x is the number of units in demand. The price per unit from the supplier is given by the equation 
where x is the number of units supplied. Find the equilibrium price and the equilibrium quantity.
A. equilibrium price: $35 per unit; equilibrium quantity: 50 units
B. equilibrium price: $50 per unit; equilibrium quantity: 30 units
C. equilibrium price: $20 per unit; equilibrium quantity: 50 units
D. equilibrium price: $30 per unit; equilibrium quantity: 50 units
Answer: D
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Express the number as the ratio of two integers.0.616161 . . .
A. 
B. 
C. 
D. 
Use rational equations to solve the problems.A loaded moving truck is traveling 20 mph faster than a freight train. In the time it takes the train to travel 60 miles, the truck travels 100 miles. Find the speed of the truck.
A. 20 mph B. 100 mph C. 50 mph D. 10 mph
Estimate the fraction as 0, 
, or 1.
A. 1
B. 
C. 0
Determine if the given ordered triple is a solution of the system.(-3, 2, -4)3x + 2y + z = -115x - 3y - z = -234x + y + 4z = -26
A. solution B. not a solution