c) \( \frac{4 a b}{9}: \frac{b^{2}}{3 a} \)

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

Which graph shows the solution of the system of equations?

Which are the coordinates of the \( x \)-intercept in the equation \( -4 x+5 y=20 \) ?

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?

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?