Aphoto printing website sells 8x 10 prints for $4.99 and 3 x 5 prints for $1.99 write an expression to represent the total amount the website can earn selling 8 x 10 and 3x5 prints

In a quadratic function of the form ax^2+bx+c, which of the following is not true? a. the y-intercept is c. b. if a is positive, the parabola opens up. c. the vertex has an x-coordinate of -b/2a. d. the axis of symmetry is the line y=-b/2a.