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Starter

Starter. Simplify the expressions: X -5, let x = 20 3y + 2, let y = 10 7x + 4y -8, let y = 2 and x = 1. Distributive Property. Review: How do we do the distributive property? Ex: 3(x + 4). P ractice. 5(x + 7) = 8(x + 4) = 7(x + 2) = 2(2x + 4) =.

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Starter

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  1. Starter • Simplify the expressions: • X -5, let x = 20 • 3y + 2, let y = 10 • 7x + 4y -8, let y = 2 and x = 1

  2. Distributive Property • Review: • How do we do the distributive property? • Ex: 3(x + 4)

  3. Practice • 5(x + 7) = • 8(x + 4) = • 7(x + 2) = • 2(2x + 4) =

  4. Modeling(You don’t have to lie. I know it’s your favorite) • How to model the distributive property • What is the formula for the area of a rectangle? • Let’s say that we have a rectangle whose length is 2 and whose width is 4. • Let’s draw a picture of it.

  5. Modeling cont. • Let’s write the formula down: 2(4) • What if we had a box with length 2 and width of x + 2. • Write the formula for the area of this box: • Draw a picture • Check your work using the distributive property.

  6. Try another one • Find the area of a rectangle with length 3 and width 2x + 1 • Draw a picture • Check with the distributive property

  7. Simplify • Use the distributive property and then substitute the value in for x. • 7(x + 4), let x = 3 • 8(2x + 7), let x = 5 • 9(x + 4), let x = -2

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