Simplify the expression. Assume all variables represent positive real numbers.
+ 
A. 4
B. 4
C. 16
D. 8
Answer: C
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Provide an appropriate response.When calculating a markup based on cost, the sale price is always equal to 100%.
A. True B. False
Solve the problem.An airline charter service charges a fare per person of $250 plus $20 for each unsold seat. The airplane holds 200 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) = 200(250 + 20x) or 50,000 + 4000x B. R(x) = (200 - x)(250 + 20x) or 50,000 + 4000x - 20x2 C. R(x) = x(250 + 20x) or 250x + 20x2 D. R(x) = (200 - x)(250 + 20x) or 50,000 + 3750x - 20x2
Find the direction the parabola opens, the coordinates of the vertex, the equation of the axis of symmetry and draw the graph.x = 3(y + 4)2 + 2 
A. 
opens left; vertex (- 2, - 4);
axis of symmetry y = - 4
B. 
opens right; vertex (- 2, - 4);
axis of symmetry y = - 4
C. 
opens right; vertex (2, - 4);
axis of symmetry y = - 4
D. 
opens right; vertex (2, 4);
axis of symmetry y = 4
Solve the problem. Write ratios in lowest terms.Tuition at a certain college recently increased from $9000 to $14,000. Find the ratio of the increase in price to the original price.
A. 
B. 
C. 
D. 