What is a, b, and c in this quadratic equation?

8x2−19x=89

a=8, b=19, c=89

a=8, b=−19, c=89

a=8, b=19, c=−89

a=8, b=−19, c=−89

How do you determine whether a relationship represented as as graph is linear or nonlinear

Pyotr tchaikovsky sporting goods operates on a 45% overhead based on the selling price, which results in an overhead of $65.34 on the newest version of an air hockey game set. if the air hockey game set costs pyotr tchaikovsky sports $49.32, find the selling price, the markup, and the net profit.

Benjamin is making bow ties. how many 1/2yards lomg bow ties can he make if he has 18 feet of fabric?