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261

<p>three children each weight 100 pounds or less their averge (arithmetic mean ) weight is 80 pounds if one of them weighs 80 pounds , what is the least possible weight , in pounds,of a child in the group? the answers is 60</p>

262

<p>Explanation:
The total of their weights are 240. [(x+y+z)/3=80]->[x+y+z=240]
One of the kids weigh 80 lbs. [240-80=160]
Find the smallest number x could be. [160-100=60]{The largest weight a child could be} Gives you the smallest weight. </p>

<p>60 lbs.</p>

263

<p>If a-x =12, b-y=7, c-z=15, and a+b+c=50, then x+y+z=?</p>

<p>Answer is 16. How do you solve this?</p>

<p>Please and thank you!</p>

264

<p>It’s plain old substitution:a=12+x b=7+y c=15+z</p>

<p>Plug it into a+b+c=50
(12+x)+(7+y)+(15+z)=50
Then you get:
x+y+z=16</p>

265

<p>a-x=12 then a=12+x ,b-y=7 then b=7+y and c-z=15 then c=15+z , 12+x+7+y+15+c=50<br>
12+7+15=34
34+x+y+z=50
x+y+z=50-34=16</p>

266

<p>1)a person paid atotal of $700 for shirts priced at $ 9 and $ 13 each if the person purchased two $ 13 shirts for every $ 9 shirt , what was the total number of shirts purchased?
2)if 1 jar +5 cups =1 tub and if 3 jars +2 cups =2 tubs, how many cups equal a tub ?
the answers of the first 60 and the secound 13</p>

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<p>i know the secound question please help me to solve the first</p>

268

<p>let a = $9 shirts, then there are 2a $13 shirts because he bought two $13 shirts for each $9 shirt</p>

<p>13(2)a + 9a = 700
35a = 700
a = 20</p>

<p>TOTAL SHIRTS = a + (2)a = 3a = 60</p>

269

<p>Thanks for the help! Greatly appreciated!!</p>

270

<p>in a discount clothing store, Billie bought 4 pairs of socks at x dollars per pair and 3 shirts at 3x dollars each. if the total cost of the socks and shirts was $ 19.50, what was the cost, in dollars,of one shirts ? the answer is 450</p>

271

<p>4 socks at x dollars each means that the total for the socks was 4x. 3 shirts at 3x dollars each means that the total cost for the shirts was 3(3x) which equals 9x. Add 9x and 4x together for the total cost of the shirts and the socks to get 13x, and since the total cost which is 13x equals 19.50, you can solve for x. x = 1.5, and since the cost of one shirt is 3x, that equals 3(1.5) which equals 4.50</p>

272

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<p>I need tthe answer of. This question plz and there are some other ones</p>

273

<p>The other one here </p>

<p><a href=“http://img211.imageshack.us/img211/4128/img2012110100226.jpg[/url]”>http://img211.imageshack.us/img211/4128/img2012110100226.jpg&lt;/a&gt;&lt;/p&gt;

274

<p>if a taxicab driver charges $0.60 for the first 1/3 mile and $0.40 for each 2/5 mile, or part there of ,after that, aride costing $ 3.80 could be at most how many miles long ? the answer is 53/15</p>

275

<p>@Amirr </p>

<p>I believe for question 1 the answer would be 72 choices

  • first seat one of the people, they can sit in any seat, so 12 choices. Next person can’t be in same row or column, so they can only sit in the 6 remaining seats (i.e. 2 rows and 3 seats each row not in same column), so 6 x 12 = 72…</p>

<p>Answer for the 2nd question is: 54

  • Since f(n+3) = 3f(n), f(7+3) = f(10) = 3f(7), then f(7) = f(4+3) = 3f(4), and from the table, f(4) = 6, so f(7) = 6x3 = 18. Then 3f(7) = 3x18 = 54 = f(10)</p>

<p>And ^ 3.80 - 0.60 = 3.20 dollars to spend on rest of trip. Since each 2/5 mile is 0.40, divide 3.20 by 0.40 to find out x 2/5 miles, comes out at 8 of those 2/5 miles. 8 x 2/5 + first 1/3 mile is 53/15</p>

276

<p>The average (arithmetic mean) of the test scores of a class of p students is 70, and the average of the test scores of a class of n students is 92. When the scores of both classes are combined, the average score is 86. What is the value of p/n (p divided by n)?</p>

<p>I did 70p + 92n/ p+n = 86. My final equation was 16p =6n. My answer was 16p over 6n. The real answer is 3/8 or essentially 6/16. Can someone explain this? Since its asking for p/n dont you divided 16p/6n?? Im confused</p>

277

<p>I need this question PLZ</p>

<p><a href=“http://talk.collegeconfidential.com/sat-preparation/759703-math-help-center-14.html[/url]”>http://talk.collegeconfidential.com/sat-preparation/759703-math-help-center-14.html&lt;/a&gt;&lt;/p&gt;

<p>the second one is </p>

<p>A perfectly spherical scoop of ice cream is to be divided by three cuts. What is the greatest number of pieces that can result from this division?</p>

<p>a)3
b)4
c)6
d)7
e)8</p>

<p>the answer is e</p>

278

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279

<p>@amir
imagine that the ice cream scoop is centered at the origin. It is broken into 8 parts by the octants formed by the three axis.</p>

280

<ol>
<li><p>In the xy - coordinate plane, the graph of x = y^2 - 4 ( x equals to y square minus 4) intersects line L at (0,p) and (5,t). What is the greatest possible value of the slope L?</p></li>
<li><p>Esther drove to work in the morning at an average speed of 45 miles per hour. She returned home in the evening along the same route and averaged 30 miles per hour. If Esther spent a total of one hour commuting to and from work, how many miles did Esther drive to work in the morning?</p></li>
</ol>

<p>These questions from old( 8 practice set) BB practice set 1 section 6. Guys if you have the old BB then could u also help me with #5>page 408 and #13>page 411…I repeat, it’s from the old BB (8 practice sets). Any help would be appreciated. :-)</p>