Solve the problem.In a school survey, students showed these preferences for instructional materials. Answer the question. 
About how many students would you expect to prefer TV in a school of 400 students?
A. About 48 students
B. About 12 students
C. About 72 students
D. About 80 students
Answer: A
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Determine the real solutions to the system of nonlinear equations.x2 + y2 - 4x + 4y + 7 = 0 x2 - y2 - 4x - 4y - 1 = 0
A. (3, -2), (1, -2) B. (3, -2), (-1, -2) C. (2, 1), (2, 3) D. (2, -1), (2, -3)
What is Medicare?
A. Unemployment insurance for workers who involuntarily lose their jobs. B. Health benefits and compensation for workers who get injured on their jobs. C. Benefit pay to workers who retire, become disabled, or to their survivors if they die. D. Health insurance for the disabled and for people over 65.
Find the coordinates of the vertex and the direction of opening of each parabola.y = (x + 3)2 - 8
A. (3, 8) opens upward B. (3, -8) opens downward C. (-3, 8) opens downward D. (-3, -8) opens upward
Divide and simplify. Assume that all expressions under radicals represent positive numbers.
A. 4
B. 4fg
C. 4
D. 