## anonymous 5 years ago How many solutions are there for the equation? x2 + 16 = 8x A. 2 B. 1 C. 0 I put B correct?

1. anonymous

yes

2. anonymous

:P Are you just guessing Satellite? :P Ur answering rly fast.. lol

3. anonymous

$x^2-8x+16=(x-4)^2$

4. anonymous

5. anonymous

(: okay

6. anonymous

what you think i made it up?

7. anonymous

How many solutions are there for the equation? x2 + 9x = -7 A. 2 B. 1 C. 0 I put A. right? and idk lol this person gave me random answers before just to get medals... dont see the good in that but thats what they did! :P I believe you though (:

8. anonymous

i think you are supposed to write $x^2+9x+7=0$ and since this doesn't factor over the integers you have to compute $9^2-4\times 1\times 7$ and see if it is positive, which it is, so you have two answers \

9. anonymous

10. anonymous

Hmmm So then i got it right ... eh?

11. anonymous

yes it is right. two anwers.

12. anonymous

next?

13. anonymous

(: haha woo hoo!! so far so good!!

14. anonymous

A boy standing on a 64 foot cliff drops a coin off the cliff. If the equation of the height h of the coin t seconds after it drops is h = -16t2 + 64, about how many seconds will the coin take to reach the bottom of the cliff? A. 1 second B. 1.5 seconds C. 2 seconds D. 2.5 seconds i guessed on this one and i got B

15. anonymous

$-16t^2+64=0$ $16t^2=64$ $t^2=4$ $t=2$

16. anonymous

no guessing.

17. anonymous

^_^ haha okay. Thanks!! (: next one Solve the equation by graphing. x2 + 5x + 8 = 0 A. {-5, 8} B. {2, 4} C. {-4, 5} D. no solution I got D correct? (:

18. anonymous

yes

19. anonymous

sits above the x - axis. not zeros

20. anonymous

(: Ivys kinda smart isnt she? lmao haha I guess i remembered more than i thought on this one :P

21. anonymous

So far only one wrong!! ^^

22. anonymous

good. just guessing or doing any work?

23. anonymous

Last one!! Solve the equation by graphing. x2 - 18x + 81 = 0 A. {-2, 9} B. {9/2, 3} C. {9} D. no solution I got C.. am i right? And i have been doing work (:

24. anonymous

$x^2-18x+81=(x-9)^2$

25. anonymous

26. anonymous

Woooo!!!!! :D turns out doing the work works mucho bettah

27. anonymous

is there more or is that all?

28. anonymous

yeah go figure nothing like actually computing!

29. anonymous

Nope. I turned it in and i got 100% i could kiss you!! lol I love this cite!!

30. anonymous

done! now forget math and do something else.

31. anonymous

congrats

32. anonymous

Haha i cant :P

33. anonymous

why?

34. anonymous

Too much work to do. Too little time.

35. anonymous

lol

36. anonymous

lol!

37. anonymous

ok i will do something else. have fun

38. anonymous

I HAVE to get my grade up to B i HAVE to!!!!!!!!! I about ready to pull out my hair!!! All i know is i AM getting that grade up before i take the exam!!!!!!!! AHHHH!! lol