The vertex is where the line y=-2x+4 intersects with the axis of symmetry of x=7. how do you write a quadratic equation in vertex form if the point (2,5) is also on the parabola?

Savannah is painting a striped background for a mural on a wall that is 1515 yards long. she wants a total of 9696 stripes that are all the same width. which calculation should savannah use to decide how wide to make each stripe?

Asap! i'm not good math and i'm lost.

The tile along the edge of a triangular community pool needs to be replaced? ?