Sunday, March 17, 2013

Jandro's and Soklang's unproject

2 step Multiply 2x+1=9 The first thing we should do in a 2 Step Multiply is to Isolate the Variable and this is what it should look like. 2x+1-1=9-1 Now that we have done this, 2x = 9-1 which is 2x = 8 9 Now that we have we have 2x = 8 we must do the opposite operation to get the value of x. Since 2x is multiplying, we must divide 2x by 2 and do the same to 8. The result we end up with would be x = 4. If you were to write it down it would look like this. 2x = 8 2x / 2 = 8 / 2 x = 4 Now we must Verify our theory 2x + 1 = 9 2(4) + 1 = 9 8 + 1 = 9 9 = 9 We also have to model this equation too and this picture will show you how: And that is how we solve 2 Step Multiply equations. 2 Step Divide x/2 + 4 = 9 What we must do is isolate the variable again. The steps are very similar to 2 Step Multiply. Since there is a positive 4, we must do the opposite operation and subtract 4 from 4 and subtract 4 from 9. x/2 +4-4 = 9 - 4 x/2 = 5 And now since theres division in this equation we must do the opposite operation which is Multiplication This is what it would look like: (x/2) x 2 = 5 x 2 x = 10 Now we must verify our answer again ( Note: We must Verify all the time in all algebraic equations) x/2 + 4 = 9 (10) / 2 + 4 = 9 5 + 4 = 9 9 = 9 That my friends is how we solve 2 Step Divide equations Distributive 2(x+4) = 10 For Distributive, we must multiply whatever is inside the brackets by whats outside of the brackets. In this case it would be 2 x (x) and 2 x 4. After you have done the steps, it should look like this: 2 x (x) = 2x 2 x 4 = 8 2x + 8 = 10 Now that we have a 2 Step Multiply Equation, all we have to do is the steps to solve a 2 Step Multiply Equation. The steps should look like this: 2x + 8 - 8 = 10 - 8 2x = 2 2x / 2 = 2/2 x = 1 Now we must Verify our answer. 2( x + 4) = 10 2 ( 1 + 4) = 10 2 (5) = 10 10 = 10 And that is how we do Distributive Equations!!!!! Important Vocabulary Words Co-efficient- Is any certain number that you can multiply a variable with, the co-efficient can be negative or positive.(example) 2x + 1 = 9 Constant - Are any numbers that are a part of the equation. They always stay the same. (example) 2x +1 = 9 Variable- Is any letter that can represent any unknown number. ( example) 2x + 1 = 9 If you are still having trouble with 2 step multiply and division, I suggest you watch this:) http://www.youtube.com/watch?v=HyUiYeLee3g If you are still having trouble with Distributive Property I suggest you watch this video:) http://www.youtube.com/watch?v=zv4qbeLok-M thank you for looking at our unproject. Jandro and i had a great time doing this.