## chubbytots 2 years ago write a variable expression to represent multiply n by 2 and add 1 to the result now make sketch an area model that corresponds to the expression. anyone?? i need help

1. waterineyes

Multiply n by 2 i.e. $$n \times 2 \implies 2n$$ Now add 1 to what we have got : $$2n + 1$$ So, your expression is : $$2n+1$$ And lastly I know about sketching the area model, I have not studied that, Sorry..

2. waterineyes

@Hero

3. waterineyes

Do you know about area model sketching???

4. waterineyes

@UnkleRhaukus do you know about area model sketching?? If yes, then we have need of yours here..

5. UnkleRhaukus

|dw:1353042074938:dw|

6. waterineyes

Is this called Area Modelling ??

7. chubbytots

yep

8. waterineyes

Great...

9. chubbytots

thanks for helping :)

10. waterineyes

@UnkleRhaukus give me one expression, I wanna try this..

11. chubbytots

another one xDD

12. UnkleRhaukus

√n^2

13. chubbytots

jamal works at a book store. he is putting copies of two kinds of books on a shelf. the first book has a width of exactly 2 cm. the second book has a width of exactly 2 in. jamal wants to know the combine width of x copies of the first book and y copies of the second book. [note: 1in= 2.54 cm] <- use this need help for this one

14. chubbytots

a. express the combined width in cm b.express the combined width in inches

15. waterineyes

@UnkleRhaukus this is not fair, you have given me hard one...

16. UnkleRhaukus

|dw:1353043048485:dw|

17. waterineyes

This is not easy for me.. $$n^2$$ will represent a Square with length of its side as 'n'. What we do when it is square root??

18. chubbytots

jamal works at a book store. he is putting copies of two kinds of books on a shelf. the first book has a width of exactly 2 cm. the second book has a width of exactly 2 in. jamal wants to know the combine width of x copies of the first book and y copies of the second book. [note: 1in= 2.54 cm] <- use this a. express the combined width in cm b.express the combined width in inches i need help for this one

19. UnkleRhaukus

$x\times2[\text{cm}]+y\times2[\text{in}]$ $=x\times2[\text{cm}]+y\times2[\text{in}]\times\frac{2.45[\text{cm}]}{[\text{in}]}$

20. UnkleRhaukus

$x\times2[\text{cm}]+y\times2[\text{in}]$ $=x\times2[\text{cm}]\frac{[\text{in}]}{2.45[\text{cm}]}+y\times2[\text{in}]$

21. chubbytots

thank u :D is that a and b??

22. UnkleRhaukus

yes

23. chubbytots

thank u again :)

24. chubbytots

thank u again :)