Describe the diffrence between algebraic expressions and numerical expressions

If x=-3 is the only x-intercept of the graph of a quadratic equation, which statement best discribes the discriminant of the equation?

Astore ordered 750 candles a total wholesale cost of $7910.20. the soy candles cosy $12.17 each and thespecialty candles cost $9.58each. how many of each were bought?

Which graph represents the same relation is the sa which graph represents the same relation as the set {(-3-2)}