Factor completely. If a polynomial cannot be factored, say it is prime.xy + 12x - 10y - 120
A. (y + 12)(x - 10)
B. (x - 12)(y + 10)
C. (x + 12)(y - 10)
D. (y - 12)(x + 10)
Answer: A
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Identify the curve as simple, closed, both, or neither.
A. Closed B. Simple C. Both D. Neither
Write an equation in slope-intercept form for the line shown.
A. y = -5x + 2 B. y = 5x - 2 C. y = -5x - 2 D. y = 5x + 2
Solve the system using the addition method. If the system is inconsistent and has no solution, state this. If the system is dependent, write the form of the solution for any real number x. 7x - 5y = 20-4x + 3y = -12
A. (-1, -3) B. ? C. (0, -3) D. (0, -4)
Solve the problem.An airline charter service charges a fare per person of $450 plus $30 for each unsold seat. The airplane holds 50 passengers. Let x represent the number of unsold seats and write an expression for the total revenue R for a charter flight.
A. R(x) = x(450 + 30x) or 450x + 30x2 B. R(x) = 50(450 + 30x) or 22,500 + 1500x C. R(x) = (50 - x)(450 + 30x) or 22,500 + 1050x - 30x2 D. R(x) = (50 - x)(450 + 30x) or 22,500 + 1500x - 30x2