## anonymous one year ago Need help with 2 more

1. anonymous

2. iGreen

Okay, do the parenthesis first.

3. anonymous

-0.9

4. iGreen

Correct, that gives us: $$\sf -4.5[2x - 0.9]$$ Now distribute -4.5 into the parenthesis..do you know how?

5. anonymous

No lol :D

6. iGreen

I just made another mistake..lol. It would actually give us: $$\sf -4.5[2x - (-0.9)]$$ Or $$\sf -4.5[2x + 0.9]$$

7. iGreen

Okay, when we distribute, we take the number outside of the parenthesis and multiply it to everything inside the parenthesis.

8. iGreen

So $$\sf -4.5[2x + 0.9]$$ becomes $$\sf (-4.5 \cdot 2x) + (-4.5 \cdot 0.9)$$ Can you simplify that?

9. anonymous

yes on second

10. iGreen

|dw:1433332473826:dw|

11. anonymous

-13.05

12. anonymous

that's what i got

13. iGreen

It's $$\sf 2x$$, not $$\sf 2$$.

14. iGreen

Multiply to a variable is the same as multiplying with numbers. $$\sf 3 \times 4x = 12x$$ $$\sf 3 \times 4 = 12$$ And we just add the 'x' next to it..so what's $$\sf -4.5 \cdot 2x$$?

15. anonymous

-9x

16. anonymous

@iGreen

17. iGreen

Correct! So we have: $$\sf -9x + (-4.5 \times 0.9)$$

18. iGreen

Multiply inside the parenthesis.

19. anonymous

-4.05

20. anonymous

now i have to do this -9 + -4.05

21. anonymous

but my calculator is not working

22. iGreen

Yes, we have: $$\sf -9x - 4.05$$ That's our answer..we can't combine them since they're not like terms.

23. anonymous

so C omg thank you i need help with one more

24. iGreen

Yep, just close this and open a new one.