1Tvwo §9.3 Working with formulas

• Wiskunde
• Middelbare school
• vwo
• Leerjaar 1

§ 9.3 Working with formulas

We've done so much with formulas, in § 9.1 and § 9.2:

+ shortening                + simplifying            + you name it!

However you might wonder:

What on earth can we DO with those formulas ?!

This burning question will be answered now!                            

y = 12 - 4x - 2x

1. y = 12 - 6x
2. y = 6x
3. y = -16x
4. y 18x

u = -3c + 4c - 6 - 7

1. u = -c - 13
2. u = c - 13
3. u = 1c - 13
4. u = -c + 13

In this paragraph we will practise how to calculate the result (= outcome) of a formula

Below are two examples.

Watch how the x sign returns, when filling in a number!

A little more about the multiplication sign follows.

And about the order of operations, too.

 Just watch the next slide!

Here is some THEORY.

Next slides shows an EXAMPLE of this theory.

And here is an example:

There are a few more complicated exercises in this paragraph.

-  That's why we now do one of them!

This will make it easier to deal with the others, 

later this lesson, on your own.

-  Open your Notebook and get a pen, please.

Make 22a in your 

Notebook, now.

ANS

My final answer to 22a is: ........

SOLUTION:

Now make 22b in your Notebook. Good luck!

Your teacher asks a few of you for your answer.

Solution:   

Finally 

make 

22c in your Notebook.

ANS

The formula for 22c is: ........

Finally 

make 

22c in your Notebook.

Solution:

SOLUTIONjkhj

Solution:

Homework:  § 9.3 Choose your path

You may skipp 22, because we did this one together.

Learning goals achieved?

if   t = 14    than p = .......

if   t = - 3   than p = .......

Solution