5) Inswer the questions below for the function: \( f(x)=x^{2}-2 x-3 \) a. Does the parabola open upward or downward? b. Is there a maximum or minimum? c. Find the axis of symmetry. d. Find the vertex. e. Determine the \( y \)-intercept. f. Determine the \( x \)-intercept(s), if they exist. g. Graph the parabola.

Solve for \( y \) \( 2 x-5 y=-12 \)

Which graph shows the solution of the system of equations?

A sequence can be described using the rule \( a_{n}=-2+3(n-1) \). Which is the value of the 20th term in this sequence?

Which number line shows the solutions of \( \frac{1}{3} x-8 \geq x+6 ? \)

A used book store buys a hardback book for \( \$ 1.50 \) and then sells it for \( \$ 5 \). Over time, the store sells the same number of books it buys. The store manager can use the equation \( P(x)=5 x-1.5 x \) to determine the store's profit, \( P(x) \), where \( x \) is the number of books that the store sells. Which statement about the book store is true based on the profit equation?