## miah Group Title @AriPotta one year ago one year ago

1. miah

2. miah

is the second one C?

3. AriPotta

4. Lynncake

Question 7: A $(8+\sqrt{2})(4-3\sqrt{2}) \rightarrow 32 -24\sqrt{2}+4\sqrt{2}-3\sqrt{2}\sqrt{2}$$32-20\sqrt{2}-3(2) \rightarrow 32-6-20\sqrt{2} \rightarrow 26-20\sqrt{2}$

5. miah

thanks guys!

6. AriPotta

and with the first one, just multiply the two fractions. 2/3 x 4/5 = 8/15

7. miah

8. miah

Which of the following is a solution to √x-4+9=6

9. miah

x = 17 x = 15 x = 5 x = 3

10. miah

@AriPotta

11. AriPotta

is that sqrt(x - 4) + 9 = 6?

12. miah

x = –3 x = –7 x = 1 x = 13 I put the wrong answer choices

13. miah

yes

14. AriPotta

ok, so subtract 9 first

15. miah

√x-4-3 ?

16. AriPotta

sqrt(x - 4) + 9 = 6 sqrt(x - 4) = -3 then square it [sqrt(x - 4)]^2 = -3^2 x - 4 = 9 add 4 x = 13

17. miah

i have one more. I gonna see if I can do it

18. miah

6√x+1=24

19. miah

I got it wrong. i got 88

20. miah

x = 17 x = 15 x = 5 x = 3

21. AriPotta

divide by 6 6sqrt(x + 1) = 24 sqrt(x + 1) = 4 square it [sqrt(x + 1)]^2 = 4^2 x + 1 = 16 subtract 1 x + 1 = 16 x = 15

22. miah