dmezzullo 3 years ago [2.08] The formula for degrees Celsius is: C = 9 over 5 (F − 32), where F stands for degrees Fahrenheit. Part 1: Solve the formula for F. Show all steps. Part 2: Determine how many degrees Fahrenheit 4 degrees Celsius is.

1. dmezzullo

show how to do every step

2. dmezzullo

@AriPotta

3. dmezzullo

@swissgirl

4. AriPotta

i thought it was 5/9?

5. dmezzullo

it is

6. AriPotta

but you wrote 9/5. i'm just making sure

7. AriPotta

idk :/ it's probably 9/5, nvm

8. swissgirl

can u draw the equation cuz I so dont follow it

9. AriPotta

|dw:1352686957842:dw|

10. swissgirl

ok gotcha

11. dmezzullo

|dw:1352687047882:dw|

12. swissgirl

Now our first step would be to isolate our F

13. AriPotta

it's 5/9 now? ugh

14. swissgirl

So first we divide the 5/9 $$\large C*\frac{9}{5} = \frac{5}{9}*\frac{9}{5} (F-32)$$ $$\large \frac{9}{5}C=F-32$$ Then we add 32 to both sides: $$\large \frac{9}{5}C+32=F-32+32$$ $$\large \frac{9}{5}C+32=F$$ And there you go there is your formula for F

15. swissgirl

ohhh whoops I meant multiply instead of divide

16. dmezzullo

this didnt come from google right?

17. swissgirl

Ok that first line should say: So first we multiply both sides by 9/5

18. swissgirl

hahaha Noooooooooo I just did it this second. I taught grade 11 HS math last year lol

19. swissgirl

All I did was isolate the F. Its a basic tool which is needed quite often in algebra

20. swissgirl

The way i would suggest you learn how to isolate is by starting off with simpler functions such as y=3x+4 And try to isloate the x.

21. swissgirl

Now Part B all its asking for you is to find out what 4 degrees Celsius is in Faranheight. Now which equation would you use?

22. dmezzullo

idk

23. swissgirl

Ok the equation we just figured out

24. swissgirl

We would like to know what F=Fahrenheit equals when c=4 $$\Large F=\frac{9}{5}C+32$$ So we plug in C=4 $$\Large F=\frac{9}{5}(4)+32$$ Ok now you solve the rest

25. dmezzullo

No

26. swissgirl

$$\large F=\frac{36}{5} +32 =39.2$$

27. dmezzullo

tyvm