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Do Now 1/26/10. Take out HW from last night. Text p. 249, #12-32 evens Copy HW in your planner. Text p. 256, #14-38 evens Quiz sections 5.4 -5.7 Friday In your notebook, explain what steps you would take in order to solve the following equation. Then solve. 12) 40 14) -48 16) -1 1/3

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slide1

Do Now 1/26/10

  • Take out HW from last night.
    • Text p. 249, #12-32 evens
  • Copy HW in your planner.
    • Text p. 256, #14-38 evens
    • Quiz sections 5.4 -5.7 Friday
  • In your notebook, explain what steps you would take in order to solve the following equation. Then solve.
homework text page 249 12 32 evens
12) 40

14) -48

16) -1 1/3

18) -1 2/5

20) 11 2/3

22) 33

24) -1/4

26) 2/3

28) 31/35

30a) 5/8 square inches

30b) 3/4x

30c) 5/8 + 3/4x = 1;

x = 1/2 inch

32a) 1/5

32b) 3750 spectators

32c) 1000 home team fans

Homework Text page 249, #12-32 evens
slide3

Remember this???

To solve equations with fractions, so far you followed these steps:

Subtract 4/5 from each side.

Write fractions using LCD

(1) Undo addition and/or subtraction to get the variable alone on one side of the equation.

Multiply each side of the equation by the MULTIPLICATIVE INVERSE of -7/15

(2) Multiply both sides of the equation by the multiplicative inverse of the variable term.

-1

Multiply

Divide (cancel)

common factors

1

objective
Objective
  • SWBAT use the LCD to solve equations and inequalities.
section 5 7 equations and inequalities with rational numbers
Section 5.7, “Equations and Inequalities with Rational Numbers”

**Another way to solve an equation with fractions is to clear fractions by multiplying the WHOLE EQUATION by the LCD of the fractions.

The resulting equation is equivalent to the original equation WITHOUT fractions.

slide6

Solving Equations by Clearing Fractions

Find LCD of all fractions in the equation, then multiply the whole equation by the LCD.

Use distributive property and simplify

each term of the equation.

Two-step equation. Solve for x.

slide8

Solving Equations by Clearing Decimals

Look for the greatest number of decimal places. Then multiply the WHOLE EQUATION by that power of 10.

Use distributive property and simplify each term of the equation.

Two-step equation. Solve for m.

slide10

Solving Inequalities by Clearing Fractions

Find LCD of all fractions in the inequality, then multiply the whole inequality by the LCD.

Use distributive property and simplify

each term of the inequality.

Two-step inequality. Solve for x.

Don’t forget to flip the inequality when dividing by a negative.

slide12

Homework

  • Text p. 256, #14-38 evens
homework punchline worksheet 79 and practice worksheet 5 6 form b evens
2) 22

4) 30

6) 38

8) 1 3/4

10) -11/24

12) -5/14

14) 35

16) -36

18) 22

20) -1/5

22) -1/6

24) 1/10

26) 80 days

Flu Shot: A JAB WELL DONE

Fourth of July: JUST UNDER EIGHT DAYS

Homework Punchline worksheet #79 and practice worksheet 5.6 Form B evens

Practice worksheet 5.6 B evens

Punchline worksheet #79