One serving of cereal is 32 grams ella needs 18 servings of cereal for a soccer team breakfast she wants to buy enough cereal with the least amount left over how much should i buy

What are the solutions of the equation? 5z^2 + 9z - 2 = 0 a. 1, -2 b. 1, 2 c. 1/5, -2 d. 1/5, 2

Erinn wrote the equation –5x + 4y = 32 to represent her hourly wage (y) and how this wage has changed during each year that she worked at a company (x). what is the rate of change in erinn's hourly wage per year?

Math i have no idea how to do a and b