How can I solve a problem using quadratic formula?

Find an equation for the linear function which has slope -10 and x-intercept -7

Through non-collinear points there is exactly one plane.

Yahir designs bracelets. he uses between 9 and 15 red and yellow beads in the ratio of 2 red bead to 5 yellow beads. drag the beads into the container to meet these requirements