## anonymous 3 years ago what is the simplified form of the expression (b/7)^2

1. anonymous

|dw:1369532637410:dw|

2. anonymous

@satellite73 I need help

3. anonymous

4. anonymous

The choices are|dw:1369532959983:dw|

5. anonymous

$(\frac{b}{7})^2 = \frac{b^2}{7^2} = \frac{b^2}{49}$

6. anonymous

B

7. anonymous

just square top and bottom on similar questions

8. anonymous

Thanks so much I have 2 other questions if you guys don't mind

9. anonymous

|dw:1369533436214:dw|

10. anonymous

Pull out the coefficients and use $x^ax^b=x^{a+b}$

11. anonymous

I don't know this at all I am a parent trying to give my 2 children some math for the summer so I am asking for the help because I have not done algebra in 25 years

12. anonymous

Okay, well do you know what coefficients are?

13. anonymous

yes

14. anonymous

Okay well then move those out so you get $2*3x^6x^{1/2}$ and use the above formula.

15. anonymous

the coefficients are the numbers in front of the variable whenever you are multiplying variables with powers you always must add the powers together

16. anonymous

what will the final answer be?

17. anonymous

6x^3

18. anonymous

$6x ^{3}$

19. anonymous

You need to add the powers, not multiply. so $6x^{6+1/2}$

20. anonymous

ok so what is the answer

21. anonymous

I will give you the choices

22. anonymous

the answer would be$6x^\frac{ 13 }{ 2 }$

23. anonymous

I have given you the answer, there is only one thing you need to do... Do you know how to add fractions with whole numbers?

24. anonymous

that is 6x^13/2

25. anonymous

so its $5x \frac{ 13 }{2 }$

26. anonymous

Guys I feel so old doing this

27. anonymous

all you need to do is add the powers which is 6+.5 and you get 6.5 which is 13/2 in fraction form so final answer would be 6x^13/2

28. anonymous

the dean at my children school said they were cheating so I have to give this these math test so that can get ready to take the big test to passed algebra

29. anonymous

this really means the world to me all the help from you guys

30. anonymous

I have another if your up for it!

31. anonymous

bring it on

32. anonymous

|dw:1369534461113:dw|

33. anonymous

on the top part is that C^9

34. anonymous

yes

35. anonymous

|dw:1369534620249:dw|

36. anonymous

ok so this expression can be re-written as $\frac{ x^9 }{ d^7 }/\frac{ x^14 }{ d^10 }$ which can be written as $\frac{ x^9 }{ d^7 }*\frac{ d^10 }{ x^14 }$ the equation software on here is complexed but that is d^10 and x^-14

37. anonymous

that is not a choice

38. anonymous

now what we can do is simplify the expression easier this way and we do this by subtracting the powers of the variable x and subtract the powers of the variable d not finished yet

39. anonymous

o sorry

40. anonymous

$\frac{ x^9 }{ x^14 }=\frac{ 1 }{ x^5 }$ andthe other one whic you get $\frac{ d^10 }{ d^7 }=d^3$ combine and you get $\frac{ d^3 }{ c^5 }$ sorry the x should have been a C

41. anonymous

if you can't see that it is d^3/c^5

42. anonymous

This one I tried but I got it wrong is it B

43. anonymous

are you guys still with me?

44. anonymous

yea my mom called for something but im back

45. anonymous

Write the recursive formula for the geometric sequence. a1 = -2 a2 = 8 a3 = -32 A. an = -4 + an-1 B. an = -2 + an-1 C. an = -2 • an-1 D. an = -4 • an-1

46. anonymous

do you want me to open this up in a new question so I can give you an award

47. anonymous

no im ok but i am looking at the sequences and none of them can i derive from the formulas given

48. anonymous

ohh never mind i got it the answer should be D

49. anonymous

You rock

50. anonymous

I am going to open up another question I want to give you an award for helping me

51. anonymous

haha thank you