Solve the problem.If an object has a 120° clockwise rotation as one of its symmetries, then it must also have as a symmetry
A. a 60° clockwise rotation.
B. a 120° counterclockwise rotation.
C. a 60° counterclockwise rotation.
D. a 180° rotation.
E. none of these
Answer: B
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Solve the problem.Find a curve through the point (-4, 1) whose length integral, 1 ? y ? 2, is L = 
A. x = -4
B. x = 
C. x = -4y5/2
D. x = 
Solve the problem.Anne and Nancy use a metal alloy that is 16% copper to make jewelry. How many ounces of an alloy that is 10% copper must be mixed with an alloy that is 20% copper to form 55 ounces of the desired alloy?
A. 38 ounces B. 33 ounces C. 22 ounces D. 24 ounces
Solve.David recently switched to a long distance phone company which charges a monthly fee of $5.45 plus $0.06 per minute. A linear function that expresses the monthly bill B as a function of minutes used m is 
What are the independent and dependent variables?
A. The independent variable is the customer, and the dependent variable is B. B. The independent variable is B, and the dependent variable is m. C. The independent variable is 5.45, and the dependent variable is 0.06. D. The independent variable is m, and the dependent variable is B.
Factor completely. If the polynomial is prime, so state.8x2 - 24xy - 32y2
A. Prime B. 8(x + y)(x - 4y) C. (8x - 8y)(x + 4y) D. 8(x - y)(x + 4y)