Solve the problem.Assume it costs 30 cents to mail a letter weighing one ounce or less, and then 28 cents for each additional ounce or fraction of an ounce. Write a piecewise-defined function P(x) that represents the cost, in cents, of mailing a letter weighing between 0 and 3 ounces.
A. P(x) = {
B. P(x) = {
C. P(x) = {
D. P(x) = {
Answer: B
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Multiply.(8x + 9y)(8x- 9y)
A. 64x2 + 81y2 B. 64x2 - 72xy + 81y2 C. 64x2 - 81y2 D. 64x2 - 72xy - 81y2
Determine which, if any, of the following functions might be used as a model for the data: Linear, with 
quadratic, with 
quadratic, with with 
neither linear nor quadratic.
A. f(x) = mx + b B. f(x) = ax2 + bx + c, a < 0 C. f(x) = ax2 + bx + c, a > 0 D. neither linear nor quadratic
Solve the problem.The Jillson's have up to $75,000 to invest. They decide that they want to have at least $40,000 invested in stable bonds yielding 6% and that no more than $20,000 should be invested in more volatile bonds yielding 12%.(a) Using x to denote the amount of money invested in the stable bonds and y the amount invested in the more volatile bonds, write a system of linear inequalities that describe the possible amounts of each investment.(b) Graph the system of inequalities. 
What will be an ideal response?
Find an equation of the secant line containing (1, f(1)) and (2, f(2)).f(x) = x3 + x
A. y = 8x - 6 B. y = -8x + 6 C. y = -8x - 6 D. y = 8x + 6