The pair of shoes shown had a sale price of $76.50. What was the retail price?

Given the quadratic function f(x)=3x^2-24x+49 a. use “completing the squares” to convert the quadratic function into vertex form b. state the vertex c. find the x and y intercepts d. graph the function

I’m still confused on how to work the percentages

The equation of a parabola is given. y=18x2+4x+20 what are the coordinates of the focus of the parabola?