## anonymous one year ago Find the exact value of tan(M).

1. anonymous

do we know anything at all about $$M$$?

2. anonymous

3. anonymous

$\tan(M)=\frac{\text{opposite}}{\text{adjacent}}$

4. anonymous

|dw:1443665613699:dw|

5. anonymous

oh 5/12

6. anonymous

yup

7. anonymous

8. anonymous

:)

9. anonymous

sure why not?

10. anonymous

btw you have my second favorite name on OS

11. anonymous

The diagonals of kite KITE intersect at point P. Which statement is true?

12. sweetburger

to find m wouldnt you need to take tan-1(5/12)

13. sweetburger

tan^-1(5/12) sorry typo

14. anonymous

Thank you @satellite73 what's your first favorite :)

15. anonymous

@sweetburger no

16. anonymous

i just said second because i didn't want to totally commit

17. sweetburger

alright

18. anonymous

btw i am going to take a stab at this geometry, but no guarantees what are the options for this "which of the following"

19. anonymous

A) <KIE=<TPE B) <TIP=<TPE C) <KIT=<KET D) <KPE=TPE

20. anonymous

going to take a minute to go through all of these

21. anonymous

the last one is true for sure

22. anonymous

i think that is the only one

23. anonymous

i was hoping for more trig

24. anonymous

If TUVW is an isosceles trapezoid with TU/ parallel to WV/, name a pair of similar triangles. Explain.

25. anonymous

WTV and WUV are similar the diagonals have the same length, TW equals UV and angle W equals angle V

26. anonymous

A. triangle UXV= triangle WXT by the SAS similarity theorem. B. triangle TXU= triangle WXV by the SAS similarity theorem. C. triangle WUV= triangle TVW by the AA similarity postulate. D. triangle TXU= triangle VXW by the AA similarity postulate.

27. anonymous

ughh... that took a long time.

28. anonymous

yeah now let me check

29. anonymous

ok first one looks good, but let me keep checking

30. anonymous

not B

31. anonymous

Ok :)

32. anonymous

Verify the identity. cos 4x + cos 2x = 2 - 2 sin2 2x - 2 sin2 x

33. anonymous

hold the phone, not done with the previous one (i hate geometry)

34. anonymous

same... I hate it too.

35. anonymous

cause C looks good too damn lets move on

36. anonymous

$\cos (4x )+ \cos (2x) = 2 - 2 \sin^2( 2x) - 2 \sin^2(x)$ i am a bit confused with the 2's can you post a screen shot or is that it?

37. anonymous

hey could we hold off on this problem for a sec, we'll come back to it. Is that fine?

38. anonymous

sure

39. anonymous

let me guess, more shape...

40. anonymous

In the figure,line AB is parallel to line CD. If the area of triangle CED/ is 425, the area of BEA / is 68, and BE = 10, find CE.

41. anonymous

yup lol.

42. anonymous

A. 25 B. 36 C. 48 D. 62.5

43. anonymous

the big triangle has area 425 and the small one area 68 is that right?

44. anonymous

yes

45. anonymous

ok we can do this

46. anonymous

the ratio of the big area to the small area is $$425:68$$ which reduces to $$25:4$$ or $$\frac{25}{4}$$ the ratio of the sides is therefore the square root of that, namely $$\frac{5}{2}$$

47. anonymous

since $$BE=10$$ multply it by $$\frac{5}{2}$$ and get $$25$$

48. anonymous

Yea I did that.

49. anonymous

ok good

50. anonymous

what do I do next?

51. anonymous

have a beer?

52. anonymous

pick A we are done, the answer is 25

53. anonymous

Find the equation of the circle that has a diameter with endpoints located at (-5,-3) and (-11,-3)

54. anonymous

this is much easier

55. anonymous

first find the midpoint you got that?

56. anonymous

do I have to type in the answer choices...

57. anonymous

no we can knock this out in a heartbeat

58. anonymous

what is the average of $$-5$$ and $$-11$$?

59. anonymous

you know what i mean? add them up, divide by 2

60. anonymous

lol no

61. anonymous

$-5-11=-16$ $-16\div 2=-8$

62. anonymous

ok in any case that makes the midpoint $$(-8,-3)$$ so the equation is $(x+8)^2+(y+3)^2=r^2$now we need $$r$$

63. anonymous

the distance between $$(-8,-3)$$ and $$(-5,-3)$$ is evidently 3 (from -8 to -5 is 3 units) so $$r=3$$

64. anonymous

final answer $(x+8)^2+(y+3)^2=9$

65. anonymous

66. anonymous

67. anonymous

i hate to break it to you but i have no \$%#@ing idea

68. anonymous

Lol that alright, hold on.

69. anonymous

repost i am sure someone knows this and i am sure it is not me

70. anonymous

Triangle GHI is similar to triangle JKL. If IH=36 and KP=18, LK=24 then MH=_____. A. 12 B. 20 C. 27 D. 48

71. anonymous

it take goddamn forever just to read it hold on

72. anonymous

@satellite73 That's fine for now we'll move on from that problem :) ^

73. anonymous

no it is doable give me a sec

74. anonymous

Lol alrighty.

75. anonymous

$\frac{18}{24}=\frac{3}{4}$ and so $\frac{MH}{36}=\frac{3}{4}$ making $MH=\frac{3\times 36}{4}$

76. anonymous

i hope 27 is a choice

77. anonymous

it is ty!

78. anonymous

whew did i mention that i hate geometry?

79. anonymous

Lol yes you did.

80. anonymous

The diagonals of rectangle NOPQ intersect at point R. If OR=3x-4 / and NP=5x+20/, solve for x. A. 2 B. 3 C. 12 D. 28

81. anonymous

$2\times OR=NP$ pr $2(3x-4)=5x+20$ solve for $$x$$

82. anonymous

*or

83. anonymous

6x-8=5x+20 -5x -5x x-8=20 +8 +8 x=28 yay!

84. anonymous

yay indeed

85. anonymous

Find the volume of a sphere with a diameter 40 cm in length. Approximate pi as 3.14 and round your answer to the nearest tenth. A. 5,026.5 cm^3 B. 33,493.3 cm^3 C. 42,090.0 cm^3 D. 268,082.6 cm^3

86. anonymous

87. anonymous

Lol fine with me.

88. anonymous

it comes right up

89. anonymous

just plug in the radius, 20

90. anonymous

you see it?

91. anonymous

Yes!

92. anonymous

google give me 33510.32 so i guess it is more exact the using 3.14

93. anonymous

Given that WXYZ is a rhombus, find the value of x. A. 15 B. 20 C. 30 D. 45

94. anonymous

aaarghhh

95. anonymous

oh not arrgghhh

96. anonymous

$4x-10=2x+20$ solve in your head

97. anonymous

Lol

98. anonymous

got it?

99. anonymous

15

100. anonymous

bingo

101. anonymous

where is all this hell coming from?

102. anonymous

If , arC NTM = arc OUM, line SP = line SQ/, S is the center of the circle, and OM = 18, find NT. Round the answer to the hundredths place. A. 11.50 B. 11.92 C. 12.05 D. 12.37

103. anonymous

no clue

104. anonymous

Hold on.

105. anonymous

Find the value of x. Round the answer to the nearest tenth, if needed. A. 9 B. 18.9 C. 22 D. 32.1

106. anonymous

got logged out

107. anonymous

I'll be right back.

108. anonymous

this one is ok $\frac{x}{21}=\frac{49}{x}$ or $x^2=1029$ making $x=\sqrt{1029}$

109. anonymous

same I lost connection or something.

110. anonymous

111. anonymous

Which of the following statements apply to a polygon with eight sides? i. It is a hexagon. ii. It is a heptagon. iii. It is an octagon. iv. It has a total interior angle measure of 1,080º. v. Each interior angle is 135º. A. i, v B. ii, iv C. iii, v D. iii, iv, v

112. anonymous

octagon for sure interior angles add to 1080