Find the vertex.f(x) = -(x + 1)2 - 3
A. (-1, 3)
B. (1, -3)
C. (1, 3)
D. (-1, -3)
Answer: D
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Solve the system using matrices. 6x - y + 9z = 219x + 7z = 342y+ z = 13
A. No solution B. (-3, 6, 6) C. (3, 1, 6) D. (3, 6, 1)
Solve the problem.A quiz has 17 problems. The total point value of the quiz is 65 points. If each multiple-choice problem is worth five points and each true-false problem is worth three points, how many of each kind of problem does the quiz have?
A. 7 multiple-choice and 10 true-false problems B. 8 multiple-choice and 9 true-false problems C. 6 multiple-choice and 11 true-false problems D. 5 multiple-choice and 12 true-false problems
Determine if the graph is symmetric about the x-axis, the y-axis, or the origin.r = 8 cos 3?
A. y-axis only B. Origin only C. x-axis only D. x-axis, y-axis, origin
Solve the problem.If the marginal price 
at x units of demand per week is proportional to the price p, and if at $80 there is no weekly demand 
and if at $50.18 there is a weekly demand of 8 units 
find the price-demand equation.
A. 
B. 
C. 
D. 