<p>different sets of 10?</p>
<p>11? nah thats too easy..don really understand the question</p>
<p>I'm not sure I understand this one either, xiggi. Nor it's level of difficulty. Does order matter? I'm guessing I'm missing something though Upon first glimpse you can have 10 blue all the way down to 1 blue with the rest being red, and 10 red all the way down to 1 red with the rest being blue, for a total of 20?</p>
<p>come on, exrunner!</p>
<p>i got 65.</p>
<p>Haha, now I don't know which problem your'e referring to. If it's the triangle, 65 is incorrect. If it's the towels, I don't know what the right answer is, unless I was right.</p>
<p>Hey, you asked for hard ones. :)</p>
<p>Think that all identicals blue towels are labeled B. However, the red towels are labeled 1,2,3,4,5,6,7,8,9, and 10. </p>
<p>See how many possibilities exist for 8 blues and two distinct red towels:</p>
<p>1 2 8 Blues
1 3<br>
1 4
1 5
1 6
1 7
1 8
1 9
1 10
2 3
2 4
2 5
2 6
2 7
2 8
2 9
2 10
3 4
3 5
3 6
3 7
3 8
3 9
3 10
4 5
4 6
4 7
4 8
4 9
4 10
5 6
5 7
5 8
5 9
5 10
6 7
6 8
6 9
6 10
7 8
7 9
7 10
8 9
8 10
9 10</p>
<p>There are 45 possibilities to arrange 8 blues towels and 2 distinct red ones ... imagine the rest. </p>
<p>The answer is 1024. This is a sum of combinations problem:
The sum of all the combinations of n things is the sum of nC0 + nC1 + nC2 + . . . + nCn. The good news is that there is a formula: nC0 + nC1 + nC2 + . . . + nCn = 2^n. In this case, it is 2^10. </p>
<p>It can also be solved by writing a Pascal triangle.</p>
<p>so, what is the answer to the triangle question?<br>
on the side, what is the level of the question (SAT?)?</p>
<p>I got 20..... is that right?</p>
<p>your guess is as good as mine. How'd you get it?</p>
<p>I'm turning crazy because I don't know the answer.</p>
<p>it is.....angle cde is 20degrees</p>
<p>ya...its a gud one....but not the best ive seen(not spkin bout SAT)</p>
<p>A question like that won't be on the sat (WAY to hard). If you solved it right, you should get 20 degrees. Lets keep this thread going, how about this one.</p>
<p>If .5 units are planed off of each face of a cube and the volume drops 169 units cubed, what is the new volume of the cube?</p>
<p>In 2-dimensional geometry, if all linear dimensions of a figure (sides of a triangle, radius of a circle) in/de-crease k times, its area swells/shrinks
k^2 times.</p>
<p>In 3 dimensions the volume of a body changes by
k^3 times.</p>
<p>Question:
what happens to the body's surface area?</p>
<p>It drops 12k and goes up 6.</p>
<p>wats so difficult bout it?
take initial side as a+1/4 and final one as a-1/4.....then u dont even haf to solve a quadratic...then u get a = 10.613474
and final vol=1113.0536</p>
<p>Umm no... Come on people, this one's pretty easy!</p>
<p>thts wat i understood bout the question....it must be more clear if tht answer is wrong.....i guess its .5 units off each edge or side....</p>
<p>i got 4299.682748</p>
<p>i set up a^3 = (a - 1/4)^3 + 169, solved for a to find the length of the old side, subtracted 1/4 to find the length of the new side, and cubed it to find the new volume</p>
<p>sat blue book page 688
here is the problem</p>
<p>IF p,r,s are 3 different prime numbrs greater than 2, and n=p<em>r</em>s, how
many positive factors , including 1 and n ,does n have</p>
<p>Eight? 1,n,p,r,s,pr,ps,rs</p>