Find the zeros of the polynomial function. State whether the graph crosses the x-axis, or touches the x-axis and turns around, at each intercept. f(x) = (x - 2)2(x2 - 25)
A. x = 2, touches the x-axis and turns around;
x = -5, touches the x-axis and turns around;
x = 5, touches the x-axis and turns around
B. x = 2, touches the x-axis and turns around;
x = 25, touches the x-axis and turns around
C. x = 2, touches the x-axis and turns around;
x = -5, crosses the x-axis;
x = 5, crosses the x-axis
D. x = -2, touches the x-axis and turns around;
x = 25, crosses the x-axis
Answer: C
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Find the domain and range and describe the level curves for the function f(x,y).f(x, y) =
A. Domain: all points in the xy-plane; range: all real numbers; level curves: parabolas
B. Domain: all points in the xy-plane excluding x = 0; range: all real numbers; level curves: parabolas
C. Domain: all points in the xy-plane; range: real numbers z ? 0; level curves: parabolas
D. Domain: all points in the xy-plane excluding x = 0; range: real numbers z ? 0; level curves: parabolas
Evaluate the function without using a calculator.
a. –3 b. –1 c. 25 d. –2
Solve the formula for the indicated variable.T = 2? for L
A. L =
B. L =
C. L =
D. L =
Solve the problem using your calculator.The paired data below consist of the test scores of 6 randomly selected students and the number of hours they studied for the test. Use a graphing calculator to model the data with a linear function that predicts a student's score as a function of the number of hours he or she studied.
A. y = 67.3 + 1.07x B. y = 33.7 - 2.14x C. y = -67.3 + 1.07x D. y = 33.7 +2.14x