algebra change of subject

1. Algebra
By the end of the lesson you should be able to :
• ­Change the subject of a formula.

2. The formula for the perimeter of a circle is:
The subject of this formula is P.
We can rearrange a formula to change its
subject.
For example if we need to calculate d, we can
make d the subject of the formula:

3. Make x the subject :
x ­ 5 = a + b

4. Make a the subject of the formula:
4a + 5 b = 20

5. The cost of hiring a taxi from the airport is given
by C = 5 + 0.75m, where C is the cost in dollars
and m is the number of kilometres driven.
Make m the subject of the formula.
Tom hired a taxi from the airport to his house.
The cost was $33. How far does Tom live from
the airport? Give your answer to 1 d.p.

6. Make s the subject of this formula:

7. The formula for the volume of a cone is
Make h the subject of the formula:

8. Make x the subject of the formula:
Are both answers correct? Justify your answer

9. Make x the subject of the formula:

10. Make x the subject of the formula:

11. Solve from Book page:118­119
EV CHANGE OF SUBJECT.pdf

12. Attachments
2009 CHANGE OF SUBJECT.docx
EV CHANGE OF SUBJECT.pdf