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1-9 Simplifying Algebraic Expressions Warm Up Evaluate each expression for y = 3. 1. 3y + y 12 2. 7y 21 3. 10y – 4y 18 4. 9y 27 5. y + 5y + 6y 36 6. 10y 30 Course 2 1-9 Simplifying Algebraic Expressions Problem of the Day Emilia saved nickels, dimes, and quarters in a jar. She had as many quarters as dimes, but twice as many nickels as dimes. If the jar had 844 coins, how much money had she saved? $94.95 Course 2 1-9 Simplifying Algebraic Expressions Learn to simplify algebraic expressions. Course 2 1-9 Simplifying Algebraic Expressions Vocabulary term coefficient Course 2 1-9 Simplifying Algebraic Expressions In the expression 7x + 9y + 15, 7x, 9y, and 15 are called terms. A term can be a number, a variable, or a product of numbers and variables. Terms in an expression are separated by + and –. 7x + 5 – 3y2 + y + x 3 term term term term term In the term 7x, 7 is called the Coefficient Variable coefficient. A coefficient is a number that is multiplied by a variable in an algebraic expression. A variable by itself, like y, has a coefficient of 1. So y = 1y. Course 2
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