If a test is 150 questions how many answers can you get wrong to still get an 80%

If f(x) = 2x + 2 and g(x) = x? , what is (gºf)(2)?

What expression is equivalent to 42x-56y

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