Tell whether the expression is a polynomial. If it is, give its degree.-2z4 + z
A. Polynomial; degree 1
B. Polynomial; degree 5
C. Polynomial; degree 4
D. Not a polynomial
Answer: C
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Translate the problem to a system of equations, then solve using Cramer's Rule.Twice the water flow in the hot-water pipe is the same as three times the flow in the cold-water pipe. The combined flow is 1200 liters per hour. What is the flow in each pipe?
A. 600 liters/hr hot, 400 liters/hr cold B. 400 liters/hr hot, 600 liters/hr cold C. 720 liters/hr hot, 480 liters/hr cold D. 480 liters/hr hot, 720 liters/hr cold
Calculate the number of subsets and the number of proper subsets for the set.
A. 128; 129 B. 128; 127 C. 127; 126 D. 64; 65
Divide.754.38 ÷ 19.8
A. 381 B. 38.1 C. 39.1 D. 3.81
Solve the problem.A marina owner wishes to estimate a linear function that relates boat length in feet and its draft (depth of boat below water line) in feet. He collects the following data. Let boat length represent the independent variable and draft represent the dependent variable. Use a graphing utility to draw a scatter diagram and to find the line of best fit. What is the draft for a boat 60 ft in length (to the nearest tenth)? 
A. 10.3 B. 10.5 C. 9.7 D. 15.7