1. Unit 2 Day 4 1/17/12 Turn in worksheet 2-2 and vocabulary definitions
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Do bell ringer
Unit 2 Day 4: Bell ringer
In the empty boxes in each table, give two numbers that multiply to be the bottom number and add to be the top number. 9 20 9 18 12 32 3
-10
-14 40

2. announcements Vocab quiz on Thursday Unit 2 test on Friday
Rough draft of projects due on Friday
$5 fee due Feb 3
If you were not here Friday come see me after class for some handouts you missed
If you paid on Friday get your receipt off the door

3. Clear your desks
LAST PROBE UNTIL MAY

4. Homework: worksheet 2-2

5. Unit 2 Day 4 Notes LITERAL EQUATIONS
(Literal equations are equations that have multiple variables and you are asked to solve for one of them)

6. 1) Solve 2x - 4y = 7 for x To get x by itself, what is the first step?
Add 2x
Subtract 2x
Add 4y
Subtract 4y
Answer Now

7. 2) Solve 2x - 4y = 7 for y To get y by itself, what is the first step?
Add 2x
Subtract 2x
Add 4y
Subtract 4y
Answer Now

8. 2) Solve 2x - 4y = 7 for y - 2x - 2x -4y = 7 - 2x -4 -4
D U
2) Solve 2x - 4y = 7 for y
· -4
+2x
-2x
÷ -4
- 2x x
-4y = 7 - 2x
Draw “the river”
Subtract 2x from both sides
Simplify
Divide both sides by -4
Does it simplify?
Nope!

9. 3) Solve for y. What is the first step?
Multiply by 3
Divide by 3
Add a
Subtract a
Answer Now

10. 3) Solve for y: y + a = 3c -a -a y = 3c - a Draw “the river”
D U
3) Solve for y:
+ a
÷ 3
· 3
- a
Draw “the river”
Clear the fraction – multiply both sides by 3
Simplify
Subtract a from both sides
y + a = 3c
-a -a
y = 3c - a

11. 4) Solve for y: 4x – 2y = 12 -4x + 12 4x - 12 -2x + 6 2x - 6
Answer Now

12. 4) Solve for y: 4x – 2y = 12 - 4x - 4x -2y = 12 – 4x -2 -2 y = -6 + 2x
D U
4) Solve for y: 4x – 2y = 12
· -2
+ 4x
- 4x
÷ -2
- 4x x
-2y = 12 – 4x
y = x
or y = 2x - 6
Draw “the river”
Subtract 4x from both sides
Simplify
Divide both sides by -2
Does it simplify?
Yes!

13. 5) The formula for the volume of a rectangular prism is V = LWH
5) The formula for the volume of a rectangular prism is V = LWH. Which equation solves the formula for L?
L = V - WH
Answer Now

14. 6) The formula for the volume of a pyramid is V =
6) The formula for the volume of a pyramid is V = Which equation solves the formula for h?
h = 3Vb
Answer Now