## anonymous one year ago Fan and Medal

1. anonymous

2. anonymous

@jim_thompson5910, @dan815

3. anonymous

@jdoe0001 ,@emily_wilson

4. anonymous

@emily_wilson

5. anonymous

r u there

6. anonymous

yeah

7. anonymous

can u help me with my homework its algebra 1

8. anonymous

Okay I can try, am I supposed to do all of that?

9. anonymous

ill do it with u though

10. anonymous

@beckyg111

11. anonymous

what is the paper/book called?

12. anonymous

springboard

13. anonymous

the green/rainbow one?

14. anonymous

ya why

15. anonymous

I cant read all of the picture

16. anonymous

which one

17. anonymous

13

18. anonymous

@haleyright

19. anonymous

13 right?

20. anonymous

yeah mostly just the word problems

21. anonymous

the 2 cutoff words are equation and equal

22. anonymous

@dan815

23. anonymous

@jim_thompson5910

24. haleyright

this is hard

25. anonymous

i know

26. haleyright

srry

27. anonymous

@_alex_urena_

28. haleyright

i tried to understand but its complicated

29. anonymous

ok

30. anonymous

anybody there who can help me

31. anonymous

pls @dan815

32. anonymous

@kiamousekia

33. anonymous

yay @jim_thompson5910 ur here

34. anonymous

and @dan815

35. jim_thompson5910

which one are you stuck on?

36. anonymous

i need help on 13-15, 17, 21, 25, 26, 27:b, 28, 34, 35, 36, 37, 38, 39:a,b, 40. i know its a lot pls forgive me

37. anonymous

nvr mind i dont need help on 28

38. anonymous

@jim_thompson5910 , @dan815 r u there

39. jim_thompson5910

well there are a lot of similar problems, so why not do it where we help with a few and you practice on the rest?

40. anonymous

ok

41. anonymous

42. dan815

okay so lets saw for a member for 1 year he just pays 35 a NON-member will pay lets say 5 dollars every time he uses the gym let n the number of uses lets see at what number of uses the member = non member 35=5*n when n=7, 5*7=35 so a non member if he uses the gym 7 times he will pay the same as a guy who payed for a whole year, if he uses the gym more than 7 times he will have to pay more than the guy with a membership, if he uses the gym less than 7 times he will have to pay less Now for your question instead of 5 dollars every time he uses, they have a different number or some random number k

43. jim_thompson5910

I'm stumped. It seems like there's information missing in #13. How much does it cost per visit? It doesn't say.

44. jim_thompson5910

is the problem cut off or something?

45. anonymous

no

46. jim_thompson5910

@dan815 where did you get those values from?

47. anonymous

it says that the cost of being a member of the frequent visitor program = the cost of not being a member

48. dan815

just made it up for an example, instead of 5 i think ninja has to use a variable there

49. anonymous

the variable is n

50. anonymous

which is the number of visits per year

51. anonymous

@dan815

52. anonymous

he left

53. jim_thompson5910

well I still think there's missing info, but anyway, let's say the cost per day is k dollars. The k is some unknown number if you visit n times for that year, then it costs k*n dollars

54. anonymous

@_

55. jim_thompson5910

set that equal to the 5 dollar yearly fee to get k*n = 5

56. jim_thompson5910

make sense?

57. anonymous

so thats the equation for 13, right?

58. jim_thompson5910

do you see how I formed it?

59. anonymous

yes

60. anonymous

61. jim_thompson5910

I think they want you to solve for n

62. jim_thompson5910

in #14

63. anonymous

oh let me try

64. anonymous

is it 5?

65. jim_thompson5910

get n all by itself in the equation k*n = 5

66. anonymous

oh let me try it that way

67. anonymous

how do u divide 5 by k

68. anonymous

nvr mind how do u get n by itself

69. jim_thompson5910

you just leave it like that, so you'd have $\Large n = \frac{5}{k}$

70. jim_thompson5910

that's what you'd have after dividing both sides by k

71. anonymous

and then

72. jim_thompson5910

if you knew the value of k (the number it represents), then you could replace k with that number and divide

73. jim_thompson5910

but we don't know what k is so we leave it like 5/k

74. anonymous

ok so thats #14

75. anonymous

is it?

76. jim_thompson5910

yeah

77. anonymous

ok

78. anonymous

#15

79. anonymous

how do u do number 15

80. anonymous

nvrmind i know that

81. anonymous

#17??

82. jim_thompson5910

what would be the answer to #15

83. anonymous

actually i dunno could u help me

84. anonymous

u there

85. jim_thompson5910

give it a try and tell me what you think

86. anonymous

is it 5 divided by the money.......i dunno!

87. jim_thompson5910

what does n represent

88. anonymous

the # of visits??

89. jim_thompson5910

yes, so 5/k represents the number of visits (because it's equal to n)

90. jim_thompson5910

if k = 1, then 5/k = 5/1 = 5 basically saying if the price per visit is \$1, then you'd have to make 5 visits for the two costs to be equal

91. anonymous

ok thank u very much

92. jim_thompson5910

no problem

93. anonymous

94. anonymous

8x + 5 = 3x + 15 solve for x

95. anonymous

ok

96. anonymous

bye

97. anonymous

wait wat

98. anonymous

.

99. anonymous

no wait

100. anonymous

@jim_thompson5910

101. anonymous

r u there

102. jim_thompson5910

can you get all the x terms to one side? and everything else to the other side?

103. anonymous

let me try

104. anonymous

is it 8x+3x = 5+15

105. jim_thompson5910

no

106. jim_thompson5910

to move that 3x over, you have to subtract 3x from both sides

107. anonymous

:O

108. jim_thompson5910

you need the 3x on the right side to turn into 0x or 0 3x-3x = 0x = 0

109. jim_thompson5910

|dw:1441242757695:dw|

110. jim_thompson5910

|dw:1441242784001:dw|

111. jim_thompson5910

|dw:1441242807116:dw|

112. anonymous

oh ok then it will be 5x+5=15

113. anonymous

@pooja195

114. anonymous

r u there @jim_thompson5910

115. jim_thompson5910

|dw:1441242986486:dw|

116. anonymous

i was right

117. jim_thompson5910

Now subtract 5 from both sides |dw:1441243014153:dw|

118. jim_thompson5910

|dw:1441243025086:dw|

119. anonymous

it will be 5x=10, right?

120. anonymous

my final answer will be x=2

121. jim_thompson5910

yes

122. anonymous

yay!!

123. anonymous

now can u help me with #26?

124. anonymous

what time is it for u?

125. jim_thompson5910

what do you have so far for #26 ?

126. anonymous

nothing cause i dont get it

127. anonymous

u there?

128. anonymous

i need help!

129. anonymous

@me10000 my buddy

130. jim_thompson5910

have you heard of the distributive property?

131. anonymous

yes

132. anonymous

I am not sure if I know this sorry....

133. anonymous

oh now i get it the 2nd step is distributive property, right?

134. jim_thompson5910

yeah because 2(x-1) turns into 2*x+2*(-1) which becomes 2x-2

135. jim_thompson5910

same with the -3(x+2)

136. anonymous

ok what about the other steps

137. jim_thompson5910

how are they simplifying line 2 to get line 3?

138. anonymous

2x-3x - 2- -6 =-1x - 8

139. anonymous

the other side stays the same

140. jim_thompson5910

how is that left side simplified? what happened?

141. anonymous

You got this slice...

142. anonymous

i combined like terms

143. anonymous

thanks for the encouragement @me10000 i would have been a goner if it wasnt for @jim_thompson5910

144. anonymous

@jim_thompson5910 r u there

145. jim_thompson5910

i combined like terms good so the reasoning is simply "combine like terms"

146. jim_thompson5910

there's no fancy math term needed

147. anonymous

Yep pm me if I can be of any assistance... With anything there than this...

148. anonymous

lol ok

149. anonymous

next step looks more complicated

150. jim_thompson5910

what's the change from line 3 to line 4?

151. anonymous

let me see

152. anonymous

they are trying to get the variable alone

153. anonymous

or are they??

154. jim_thompson5910

yeah that's the ultimate goal

155. jim_thompson5910

focus just on line 3 and line 4 what changes?

156. anonymous

they are adding 4x to both sides

157. jim_thompson5910

yep

158. jim_thompson5910

they are using the additive property of equality

159. jim_thompson5910

additive property of equality if a=b, then a+c = b+c

160. anonymous

oh now i get it

161. anonymous

line 5 looks like the answer of line 4

162. jim_thompson5910

what changed here

163. anonymous

i dunno

164. anonymous

r u there

165. anonymous

did u leave?? oh no!

166. jim_thompson5910

what changed from -1x+4x-8 = 8-4x+4x to 3x-8 = 8 look closely

167. anonymous

nvrmind ur here i got scared

168. anonymous

-1x+4x became 3x

169. jim_thompson5910

so you combined like terms

170. jim_thompson5910

same for -4x+4x = 0x = 0

171. anonymous

oh ok

172. anonymous

Let me guess: the next line is additive property of equality, right?

173. jim_thompson5910

why would it be that rule?

174. anonymous

Because they are adding 8 to both sides. Am I right?

175. jim_thompson5910

good

176. anonymous

Yay!!

177. jim_thompson5910

I'll be right back.

178. anonymous

the next line is combine like terms

179. anonymous

ok

180. anonymous

tell me when ur back

181. anonymous

r u there yet

182. anonymous

hello??

183. jim_thompson5910

the next line is combine like terms correct

184. anonymous

the next line is division property of equality, right?

185. jim_thompson5910

correct

186. anonymous

the last step is combine like terms, right?

187. jim_thompson5910

no, it's to convert the improper fraction to a mixed number

188. anonymous

oh ok thanks

189. jim_thompson5910

np

190. anonymous

whats #27

191. anonymous

u there

192. jim_thompson5910

what did you write in pencil? I can see something faintly written

193. anonymous

thats for part a of the question. its this: 4w+12(w-1)=36

194. jim_thompson5910

what does w represent

195. anonymous

im sorry but i forgot it was for

196. jim_thompson5910

how did you form the equation?

197. anonymous

i copied from my teacher

198. jim_thompson5910

and you don't remember how the teacher got it?

199. anonymous

the teacher was ina hurry

200. jim_thompson5910

give a guess what w represents

201. anonymous

the total distance?

202. jim_thompson5910

w = walking w is the time spent walking

203. jim_thompson5910

in hours

204. jim_thompson5910

so w-1 is the time spent biking (1 hour less)

205. anonymous

oh ok

206. jim_thompson5910

if you walk for w hours, and you walk at a speed of 4 mph, then how far do you walk?

207. anonymous

4*w

208. anonymous

u there

209. jim_thompson5910

yep, how far do you go when you bike?

210. anonymous

12*w

211. anonymous

is it?

212. jim_thompson5910

not just w though

213. anonymous

then what?

214. anonymous

is it 12*w-1

215. jim_thompson5910

the 12(w-1) like you wrote

216. jim_thompson5910

12 times (w-1)

217. anonymous

yes i was right the second time

218. jim_thompson5910

so the two distances add to get 4w+12(w-1)

219. jim_thompson5910

that's how he got that left side

220. anonymous

now we find the value of w, right?

221. jim_thompson5910

yeah for part b

222. anonymous

im doing it

223. anonymous

i found it: x=3

224. anonymous

am i right?

225. jim_thompson5910

w = 3 is correct

226. jim_thompson5910

so he walked for 3 hrs and biked for 2 hrs (since w-1 = 3-1 = 2)

227. anonymous

how did he walk 3 hrs though?

228. jim_thompson5910

you just solved to get w = 3

229. anonymous

ya so?

230. jim_thompson5910

w represented the number of hours walked

231. anonymous

oh ok thanks now i get it.

232. anonymous

thnks for everything bro ur the best.