How do you find the x-coordinate of the vertex of a parabola if you only have the equation

Answer and Explanation:

The vertex formula is derived from the completing-the-square process, just as is the Quadratic Formula. In each case, memorization is probably simpler than completing the square.) For a given quadratic y = ax2 + bx + c, the vertex (h, k) is found by computing h = –b/2a, and then evaluating y at h to find k.

BRAINLIEST PLS!!!

the amount you'd have after the work is $1.55

step-by-step explanation:

you subtract 95% from $31.