<p>There was one, something about x being double y? Answer was x=82.</p>
<p>the question was: Two positive integers x and y add up to 123. If x/y=2, what is x?</p>
<p>I had trouble with this question:</p>
<p>What is the units digit of k^1459 where k is an integer with units digit of 3?</p>
<p>jkbonds, here's the solution:</p>
<p>if 3 is the last digit of k, then we know that every 4th power of k must end in the digit 1, since 3^4=81. Using this, we can then drastically reduce that nasty number, 1459. The closest power to 1459 that is divisible by 4 is 1456, which would be the same as saying (3^4)^364 (Since 1456/4 = 364, it would be the same thing as 3^1456) and since we know every 4th power of k must end in the digit 1, all we have left is 3^3. Multiply the two factors (3^1456 and 3^3), or actually, just their last digits, (1 and 7), and you'll get the last digit of k^1459. 7.</p>
<p>Hope that was clear enough! :P</p>
<p>SOMEONE PLEASE HELP ME!</p>
<p>I had the following problem and I can't find anyone else who did.</p>
<p>There was a line with 2 points on it intersecting Line "l". The lengths of the now segments were 2 and 3, and you had to figure out the probability that a point chosen at random on the entire line(length of 5) would intersect line "l." </p>
<p>It seems so simple but it's bugging the hell outta me!</p>
<p>I said 2/5 (the distance to the left of the point out of the total length) but I wasn't sure either...bugged me too because I felt like I should have been more sure..</p>
<p>I'm pretty sure it was 2/5.</p>
<p>thanks!! im glad i put 7, theres been so many different answers people have come up with different ways, here was my very odd approach:
seeing that the number we wanted was 1459 i noticed it ended in a 9 so:
3^19, units digit is 7, and 19/2 = 9.5 (odd number +.5)
3^29, units digit is 3, and 29/2 = 14.5 (even number +.5)
3^39, units digit is 7, and 39/2 = 19.5 (odd number +.5)
3^49, units digit is 3, and 49/2 = 24.5 (even number +.5)
and so forth..
then i did 1459/2 and you get 729.5 (odd number +.5) which correlates to a number with units digit ending in 7... i dont know why i decided to divide by 2, but i was desperate to find a pattern, and luckily that worked, phew! 7 it is!</p>
<p>I said 2/5 too.</p>
<p>I have a question about that black triangle one.</p>
<p>I decided to plug in, for example, 6 for x.</p>
<p>-6+1==5</p>
<p>[blacktriangle]5= -5 +1 = -4</p>
<p>So I wrote -x+2</p>
<p>I don't understand how you get x.</p>
<p>I'm pretty sure it's 2/5.</p>
<p>I put 2/5 as well...can anyone confirm this with a good explanation?</p>
<p>Anyone have this problem? I'm guessing it is experimental:</p>
<hr>
<p>| this is a|
| square |
|_<strong><em>|</em></strong>________</p>
<p><--x--></p>
<p>measure of this whole bottom thing is x
measure of each of the lenghs of the square is 1
then there is another line (i cant draw it here on the computer) that connects the top left corner of the square to the righterst part of the bottom line.then you were to find 'a' which is the length of one of the sides of the triangle that forms by drawing that line i just mentioned</p>
<p>find a in terms of x</p>
<p>yeah skid marks was 1/9 and </p>
<p>the question was: Two positive integers x and y add up to 123. If x/y=2, what is x?
x = 82 and y = 41.</p>
<p>I'm almost pretty sure it's 2/5 because only the part of the line with length 2 could intersect line l, and because the line is 5 cm, i put 2/5.</p>
<p>giants, I did that problem 2 pages back, but here it is:</p>
<p>/_\x=-x+1</p>
<p>/<em>(/</em>\x)=
/_(-x+1)=
-(-x+1)+1=
x-1+1=
x</p>
<p>(the /_\ is a triangle :P)</p>
<p>I got one where its a bunch of half circles and the area I got was 7pi
For the one where 2/3 are greater than k, I said k could be 3, since there were 4 numbers among the 6 greater than k, I said k had to be greater than 2.8</p>
<p>For another problem it was about languages - 15 kids were surveyed, 8 take spanish, 5 take french, 2 take french/spanish. How many take nothing? I said 4 kids take nothing</p>
<p>For the bettery one, you can buy batteries in 2 pack, 4 pack, or 10 pack, there are 5 different ways to get a combination of 12 from those packs (my answer)</p>
<p>For the area of the trapezoid, k=6</p>
<p>all right my friend ^_^</p>
<p>Oh, the one with the balloons and how many each kid got. Numbers were 85 and 65...I know I put the right one but I don't remember which one it was.</p>
<p>hey skiierdude, you had the same test for me pretty much. but did you have that problem i mentioned earlier (scroll up a little) that involves finding 'a' in terms of x? i'm so persistent in trying to find out if people had this to see if that was the experimental section.</p>
<p>i think it is. never had that</p>