Please help and explain how you got the answer. Im giving out brainliest. || Q4

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

This question awards 100 ! i really don’t want to fail i will also mark you !

Liz is shipping a package to her friend.the maximum weight of a medium flat-rate box is 20 pounds,including the box which weighs 6 ounces.write and solve an inequality to describe the possible weight ,w, of the contents that liz will ship to her friend if she must use a medium flat-rate box.