Solve the system by substitution.
A. (-3, -4), (3, -4)
B. (-4, 3), (-3, -4), (3, -4), (4, 3)
C. (-4, 3), (4, 3)
D. (9, 68), (16, 243)
Answer: B
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Use a graphing utility to graph the equation. Use the graph to approximate the values of x that satisfy each inequality.
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Equation:
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Inequality:
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A. ?
B. ?
C. ?
D. ?
E. ?
Solve the problem.A field microphone used at a soccer game has a parabolic cross section and is 16 in. wide at the opening. The focus is 4 in. from the vertex. Find the depth of the microphone.
A. 4.00 in. B. 1.78 in. C. 16.00 in. D. 64.00 in.
Graph the function.y = csc 
A. 
B. 
C. 
D. 
Use a proportion to solve the problem.The ratio of the lengths of strings that play the notes D and A is 3 to 2. If a string 84 centimeters long plays a D, what is the length of the string that plays an A?
A. 87 centimeters B. 56 centimeters C. 126 centimeters D. 86 centimeters