# math

Sam is 10 years younger than one-half the age of his aunt. Let a represent his aunt’s age. Which shows his aunt’s age written as an algebraic expression and Sam’s age if his aunt is 40?
mc020-1.jpg; when mc020-2.jpg Sam is 2 years old
mc020-3.jpg; when mc020-4.jpg Sam is 6 years old
mc020-5.jpg; when mc020-6.jpg Sam is 10 years old
mc020-7.jpg; when mc020-8.jpg Sam is 30 years old

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1. Sam's age = (1/2)a - 10 or a/2 - 10

if a = 40
Sam = (1/2)(40) - 10
= 10

match that up with your choices

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2. Sam is 10 years younger than one-half the age of his aunt. Let a represent his aunt’s age. Which shows his aunt’s age written as an algebraic expression and Sam’s age if his aunt is 40?

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3. Tawny wrote an expression to represent “the quotient of 82 and a number, decreased by 26.” She then evaluated the expression when n = 2. Which statements are true about the expression and its value? Check all that apply.

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