Could someone help please i’m in the middle of a math exam!!

For f(x)=2x+1 and g(x)= x^2 -7, find (f•g)(x)

Planning for the possibility that your home might get struck by lighting and catch on fire is part of a plan for ?

Damon makes 20 cups of lemonade by mixing lemon juice and water. the ratio of lemon juice to water is shown in the tape diagram. lemon juice\text{lemon juice} lemon juice water\text{water} water how much lemon juice did damon use in the lemonade? cups