Solve the system by graphing. If there isn't a unique solution to the system, state the reason. y - 4x = 54y = 16x + 20
A. inconsistent system of equations
B. (-1.5, -1)
C. (1, 1)
D. dependent equations
Answer: D
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Solve the problem.A deep sea diving bell is being lowered at a constant rate. After 12 minutes, the bell is at a depth of 400 feet. After 50 minutes the bell is at a depth of 1400 feet. What is the average rate of lowering per minute?
A. 28.0 ft per minute B. 26.3 ft per minute C. 20.0 ft per minute D. 0.04 ft per minute
Solve the problem.Find the acceleration at time t = 4 s if the position (in cm) of a particle moving along a line is 
at time t.
A. 317 cm/s B. 138 cm/s2 C. 138 cm/s D. 317 cm/s2
Solve. If needed, round money amounts to two decimal places and all other amounts to one decimal place.The owners of a candy store want to sell, for $6 per pound, a mixture of chocolate-covered raisins, which usually sells for $3 per pound, and chocolate-covered macadamia nuts, which usually sells for $8 per pound. They have a 
barrel of the raisins. How many pounds of the nuts should they mix with the barrel of raisins so that they hit their target value of $6 per pound for the mixture?
A. 96 lb B. 78 lb C. 90 lb D. 84 lb
Solve the problem.The magnitude of an earthquake, measured on the Richter scale, is given by 
where I is the amplitude registered on a seismograph located 100 km from the epicenter of the earthquake, and I0 is the amplitude of a certain small size earthquake. Find the Richter scale rating of an earthquake with an amplitude of 63,096 I0.
A. 4.8 B. 3.8 C. 0.48 D. 11.1