 # Do Now 1/25/10 Take out HW from Friday. Take out HW from Friday. Text page 245, #16-34 evens, #37 Text page 245, #16-34 evens, #37 Copy HW in your planner.

## Presentation on theme: "Do Now 1/25/10 Take out HW from Friday. Take out HW from Friday. Text page 245, #16-34 evens, #37 Text page 245, #16-34 evens, #37 Copy HW in your planner."— Presentation transcript:

Do Now 1/25/10 Take out HW from Friday. Take out HW from Friday. Text page 245, #16-34 evens, #37 Text page 245, #16-34 evens, #37 Copy HW in your planner. Copy HW in your planner. Text page 249, #12-32 evens Text page 249, #12-32 evens In your notebook, answer the following question. Draw a picture of what an equation looks like to you. Then give an example of a multiplication and division equation. In your notebook, answer the following question. Draw a picture of what an equation looks like to you. Then give an example of a multiplication and division equation.

Homework Text p. 245, #16-34 evens, #37 16) 39/40 16) 39/40 18) -14/27 18) -14/27 20) 6 1/4 20) 6 1/4 22) -20 2/3 22) -20 2/3 24) -42 1/2 24) -42 1/2 26) 10/847 26) 10/847 28) 5 bookmarks 28) 5 bookmarks 30) 6/7 32) -20/33 34) 1 2/3 37) 22

EQUATION – EQUATION – mathematical sentence formed by placing an “=“ between two expressions y – 8 = 12 y – 8 = 12 22 = 14 + z 11a = 121 11a = 121 5 ÷ x = 30 5 ÷ x = 30 Remember this???

Equation Like a scale, the left side and right side must be the same in order to be balanced! Like a scale, the left side and right side must be the same in order to be balanced! + 7 = 10 Left side Right side x ‘x’ has to be 3 in order to make the equation balanced. Remember this???

Equation Like a scale, the left side and right side must be the same in order to be balanced! Like a scale, the left side and right side must be the same in order to be balanced! = 10 Left side Right side x 47

Objective SWBAT use multiplicative inverses to solve equations. SWBAT use multiplicative inverses to solve equations.

Section 5.6, “Using Multiplicative Inverses to Solve Equations” Multiplicative Inverse Property To solve an equation that has a fractional coefficient, you can multiply each side of the equation by the fraction’s multiplicative inverse. To solve an equation that has a fractional coefficient, you can multiply each side of the equation by the fraction’s multiplicative inverse. MULTIPLICATIVEINVERSE RECIPROCAL =

MULTIPLICATIVE INVERSE– the product of a number and its multiplicative inverse is 1.

Solve for x. Multiply each side of the equation by the MULTIPLICATIVE INVERSE of 4/7 Divide (cancel) common factors 1 -3 Multiply

Try It Out!! Solve

Solving Multi-Step Equations How can you get the “unknown” by itself? How can you get the “unknown” by itself? Solving Equations with Variables on Both Sides STEP 1- Use distributive property and combine like terms. STEP 2- Collect variables on one side of the equation. STEP 3- “Undo” addition and/or subtraction. STEP 4- “Undo” multiplication and/or division. STEP 5- Solve for the variable. STEP 6- Check your work. Remember this???

Solve for x. Multiply each side of the equation by the MULTIPLICATIVE INVERSE of -7/15 Divide (cancel) common factors Multiply Subtract 4/5 from each side. Write fractions using LCD 1

Try It Out!! Solve

Homework Homework Text page 249, #12-32 evens Text page 249, #12-32 evens

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