Solve this problem.The average rate of speed of a car in heavy traffic on an expressway is 5 miles per hour faster than when on an ordinary highway. It takes the car one hour longer to go 200 miles on the ordinary highway than 200 miles on the expressway. What is the average rate of speed on the expressway?
A. 35 miles per hour
B. 25 miles per hour
C. 30 miles per hour
D. 20 miles per hour
Answer: B
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Solve the problem using matrices.An application of Kirchoff's Rules to the circuit shown results in the following system of equations:
Find the currents I1, I2, and I3.
A. I1 = 2.5, I2 = 1.5, and I3 = 1 B. I1 = 3.5, I2 = 2.5, and I3 = 1 C. I1 = 5.5, I2 = 4.5, and I3 = 1 D. I1 = 4.5, I2 = 3.5, and I3 = 1
Use a combination of rules for exponents to simplify. Write answers with only positive exponents. Assume that all variables represent nonzero real numbers.
A. 622 B. 67 C. 618 D. 611
Graph the function.y = csc
A. 
B. 
C. 
D. 
Given the term, idenitfy the coefficient, the variable, and the exponent of the variable.- 
k4
A. coefficient: 
variable: k
exponent: 4
B. coefficient: - 
variable: k4
exponent: 1
C. coefficient: k
variable: - 
exponent: k4
D. coefficient: - 
variable: k
exponent: 4