## anonymous one year ago Need answer verification please (2y)^2+4y When y=-3 We got 24

1. UsukiDoll

when y = -3 we have $(2(-3))^2+4(-3)$ $(-6)^2 -12$ $36-12 = 24$

2. anonymous

Could you check another?

3. UsukiDoll

sure

4. anonymous

Thank you, I'm trying to help her finish hers so I can start on mine lol

5. anonymous

m^3+3(x+2) when m=-2 and x=4

6. anonymous

I got 10, she got 14

7. UsukiDoll

ok so first we need to plug in m=-2 and x = 4 $m^3+3(x+2)$ $(-2)^3+3(4+2)$ $\[-8+3(6)$\] $-8+18 = 10$

8. anonymous

Do you care if I keep typing more?

9. UsukiDoll

depends on the topic and difficulty how many more problems?

10. anonymous

Same stuff and I will take whatever help you can give until you dont want to anymore because there is quite a few more

11. UsukiDoll

ok...

12. anonymous

6k^3+3d k=-1 and d=-2 We got -12

13. UsukiDoll

$6k^3+3d$ for k=-1 and d = -2 $6(-1)^3+3(-2)$ $6(-1)+3(-2) \rightarrow -6-6 =-12$

14. anonymous

Thanks... (4+x)^2/x-6 when x=6 We got 100

15. UsukiDoll

$\frac{(4+x)^2}{x-6}$ for x = 6.. wait a minute... this is undefined... if we let x = 6 in the denominator we will have 100/0 and we can't have a 0 in the denominator.

16. anonymous

oops it was supposed to be x-1 on the bottom

17. anonymous

18. UsukiDoll

oH! xxxxxxxxxxxxxxD

19. UsukiDoll

$\frac{(4+x)^2}{x-1}$ for x = 6 100/5 = 20 yup !

20. anonymous

The next one is 4+7/x-2 + 3 when x=5 We got 6 2/3

21. UsukiDoll

is it $4 + \frac{7}{x}-2 +3$ or $4 + \frac{7}{x-2} +3$ ???

22. UsukiDoll

I don't understand the format of the question... could you draw it out?

23. anonymous

Ill just skip that one I cant figure out how to type it lol

24. anonymous

I'll try

25. anonymous

|dw:1436328059205:dw|

26. UsukiDoll

that's better.

27. UsukiDoll

|dw:1436328132055:dw|

28. UsukiDoll

|dw:1436328175777:dw|

29. anonymous

WOOO

30. anonymous

3(x-2)^3+x When x=4 We got 28

31. UsukiDoll

|dw:1436328303921:dw|

32. anonymous

-5y^3+6k when y=-2 and k=1 We got 46

33. UsukiDoll

|dw:1436328365051:dw|

34. anonymous

|dw:1436328423858:dw|

35. anonymous

x=9 and m=-3

36. anonymous

we got 9

37. UsukiDoll

:/ I got multiple answers on this one.

38. UsukiDoll

|dw:1436328778177:dw|

39. nincompoop

use PEMDAS

40. UsukiDoll

PEMDAS will tell me to do parenthesis.. k check then I do multiplication.. now I need division.

41. anonymous

We have like 5 more if that's ok

42. UsukiDoll

k that's fine.. it's easy enough.

43. anonymous

6(h-3)^2+5v H=6 and v=-5 We got 29

44. UsukiDoll

|dw:1436328918849:dw| for the previous problem

45. anonymous

|dw:1436328947288:dw|

46. UsukiDoll

|dw:1436328955660:dw|

47. UsukiDoll

I'm kind of delayed a bit xD

48. anonymous

Srry lol

49. UsukiDoll

|dw:1436329045925:dw| anything to the 0 power will result in a 1. so for 6^0 since 6 is raised to the zero power, our result is just 1 The zero exponent rule basically says that any base with an exponent of zero is equal to one. For example: x^0 = 1

50. anonymous

|dw:1436329245453:dw|

51. UsukiDoll

|dw:1436329313843:dw|

52. anonymous

|dw:1436329393789:dw|

53. UsukiDoll

is it x = -2 or x = 2 ?

54. UsukiDoll

the = sign and - sign are squished together so it's hard to tell .

55. anonymous

it's -2

56. UsukiDoll

|dw:1436329522740:dw| the negative sign being distributed for -(-8) cancels the negative it's similar to -1(-8) = 8 a negative times a negative is a positive.

57. UsukiDoll

if the x was 2, then the answer would be 2 -(2)^3+2(5) -8+10=2

58. anonymous

I thought -2^3 was -8

59. UsukiDoll

I think it had something to do with the negative in front of -x^3 and since x = -2 we had -(-2)^3

60. UsukiDoll

-(-8) ->8

61. UsukiDoll

let me recheck on a calculator

62. anonymous

Gotcha

63. UsukiDoll
64. anonymous

|dw:1436329893072:dw|

65. UsukiDoll

|dw:1436329942432:dw|

66. anonymous

|dw:1436329944652:dw|

67. UsukiDoll

uh oh... is r = -2 or r = 2 ?

68. anonymous

|dw:1436329996706:dw|

69. UsukiDoll

r is confusing.. I gotta be honest it can go both ways.

70. anonymous

|dw:1436330028192:dw|

71. anonymous

Sorry I just sent I think the last 2

72. UsukiDoll

|dw:1436330096190:dw|

73. anonymous

r is -2

74. UsukiDoll

|dw:1436330131414:dw|

75. anonymous

oops theres a couple more

76. anonymous

Can I type all 5 real quick? I have to run outside quickly

77. UsukiDoll

|dw:1436330190606:dw||dw:1436330281564:dw| yeah sure

78. anonymous

|dw:1436330310576:dw|

79. anonymous

|dw:1436330398457:dw|

80. anonymous

|dw:1436330429068:dw|

81. anonymous

|dw:1436330461718:dw|

82. anonymous

|dw:1436330497051:dw|

83. UsukiDoll

|dw:1436330454834:dw||dw:1436330658029:dw||dw:1436330733880:dw||dw:1436330763180:dw||dw:1436330801972:dw|

84. UsukiDoll

SO far, the answers are wrong. It's not good to rush at math problems because there will be mistakes.

85. anonymous

She did those in her class, I just wanted to double check them but didn't have a chance yet lol

86. UsukiDoll

oh I see xD

87. anonymous

Thank you for all your help!!