Plzz someone help me out

Complete the standard form of the equation that represents the quadratic relationship displayed above, where a, b, and c are rational numbers.

To decrease an amount by 16% what single multiplier would you use

An unknown number x is at most 10. which graph best represents all the values of x? number line graph with closed circle on 10 and shading to the right. number line graph with open circle on 10 and shading to the right. number line graph with open circle on 10 and shading to the left. number line graph with closed circle on 10 and shading to the left.