What is the vertex and solutions of y=-x^2-4x+7

Twenty-five percent of the customers entering a grocery store between 5 p.m. and 7 p.m. use an express checkout. consider five randomly selected customers, and let x denote the number among the five who use the express checkout.

Can someone answer it, and plot it, for 20 points and brainliest answer? p.s. they're the same ! : )

Timmy uses 1 1 2 cups of sugar for every 2 gallons of lemonade he makes. how many cups of sugar would timmy use if he makes 13 gallons of lemonade?