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What is the inverse of the function f(x) = 2x + 1?

Calculate the missing value. round the answer to on decimal place. start with 70, increase it by 21%, and end up with

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