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#1 Re: Help Me ! » Lattice Point Question » 2014-11-09 03:50:36
What does a question mean if a variable is inversely proportional to another variable?
Ex: You are given that x is directly proportional to
, and y is inversely proportional to . If the value of x is 3 when z is 12, what is the value of x when z is equal to 75? Express your answer as a common fraction.
Could someone help?
#2 Re: Help Me ! » Lattice Point Question » 2014-11-09 03:39:21
What does a question mean if a variable is inversely proportional to another variable?
Ex: You are given that x is directly proportional to
, and y is inversely proportional to . If the value of x is 3 when z is 12, what is the value of x when z is equal to 75? Express your answer as a common fraction.#3 Re: Help Me ! » Lattice Point Question » 2014-11-09 03:31:41
Hmm... the answer was 29. What did we miss. I get 28 as well after counting. Maybe the origin?
EDIT: oh, I did miss the origin.
Thanks!
SolarDevil
#4 Re: Help Me ! » Lattice Point Question » 2014-11-09 03:30:39
Okay. Thanks!
#5 Re: Help Me ! » Lattice Point Question » 2014-11-09 03:20:14
Yes we are looking at the area on top that is surrounded by the two graphs. It as an oval end on the top and a pointy end on the bottom (the pointy end is on (0,0))
#6 Re: Help Me ! » Lattice Point Question » 2014-11-09 03:15:05
bobbym wrote:Bounded meaning what here?
I'm assuming he means that there is some real number P such that |f(x)|≤P for all x in the domain of definition of f. So it can't be infinite.
Yup.
#7 Re: Help Me ! » Lattice Point Question » 2014-11-09 03:12:13
Surrounding the figure that is formed by the intersection of the two graphs
#8 Re: Help Me ! » Lattice Point Question » 2014-11-09 03:02:22
Well, it is bounded so no. When I graph it, it forms a weird figure. I think they mean by bound as the surrounding stuff around the enclosed region.
Thanks,
SolarDevil
#9 Help Me ! » Probability Question » 2014-11-09 02:32:00
- SolarDevil
- Replies: 1
Carson flips over the cards of a standard 52-card deck one at a time. What is the probability that he flips over the ace of spades before any face card (jack, queen or king)?
Thanks,
SolarDevil
#10 Help Me ! » Euclidean Algorithm Problem » 2014-11-09 02:28:47
- SolarDevil
- Replies: 8
What is the answer to this question?
For how many integers
satisfying is it true that the fraction cannot be simplified?Thanks,
SolarDevil
#11 Help Me ! » Lattice Point Question » 2014-11-09 02:25:37
- SolarDevil
- Replies: 21
What is the answer to this question?
A lattice point is a point whose coordinates are both integers. How many lattice points are on the boundary or inside the region bounded by
and ?Once I get the answer I can review the solution.
SolarDevil
#12 Re: Help Me ! » Trig Problem » 2014-11-09 02:24:11
Okay. Thanks so much!
#13 Re: Help Me ! » Trig Problem » 2014-11-03 13:02:05
Nevermind I got that one!
However could I have help on another one?
In right triangle
, we have and D is the midpoint of . If AB = 7 and BC = 25, then what is ?#14 Help Me ! » Trig Problem » 2014-11-03 11:59:48
- SolarDevil
- Replies: 4
#15 Re: Help Me ! » Interesting Geo Problem » 2014-10-30 09:20:08
Nevermind! I got it! For those wondering, you just find the ratios of a sphere because as you get more faces it becomes more like a sphere!
Solar
#16 Help Me ! » Interesting Geo Problem » 2014-10-29 10:47:41
- SolarDevil
- Replies: 1
Polyhedron P is inscribed in a sphere of radius 36 (meaning that all vertices of P lie on the sphere surface). What is the least upper bound on the ratio
volume of P / surface area of P
In other words, what is the smallest real number t such that
volume of P/ surface area of P is less than or equal to t
must be true for all polyhedra P that can be inscribed in a sphere of radius 36?
#17 Re: Help Me ! » stuff in a box » 2014-10-29 10:45:30
Hi droid347! Welcome to the forum! and... yes it is a good problem
Solar.
#18 Re: Help Me ! » stuff in a box » 2014-10-29 09:30:25
Oh, I see. Thanks!
#19 Re: Help Me ! » stuff in a box » 2014-10-28 11:48:12
V=1/3*base area*height
V=5/3*base area
so
Area of base= rt29*3/2
So V=5rt29/6
oops 5rt29/6
Solar
#20 Re: Help Me ! » some 3d stuff :D » 2014-10-28 11:43:03
Nevermind. I have got it solved 
Solar
(btw this is aops geo stuff)
#21 Re: Help Me ! » Tautologies » 2014-10-28 11:41:50
That would be very helpful!
#22 Re: Help Me ! » Tautologies » 2014-10-27 10:53:20
Haha... I understand what truth tables are but I don't get what symbols he is using to try to explain a tautology.
¬A∨(B→C) ≡ ((¬A∨B)→C)
¬A∨(¬B∨C) ≡ ¬(¬A∨B)∨C
(¬A∨¬B)∨C ≡ ¬(¬A∨B)∨C
I could write it out by hand but that would v represent?
#23 Re: Help Me ! » Calc Problem for Class » 2014-10-27 10:50:37
I believe that is it. Thanks bob bundy.
Also, thanks bobbym for straightening my LATEX.
#24 Re: Help Me ! » some 3d stuff :D » 2014-10-27 10:48:44
Hmmm... well. When I enter it in it says that x is incorrect. What is wrong?
#25 Help Me ! » Calc Problem for Class » 2014-10-26 06:14:56
- SolarDevil
- Replies: 3
Hi! Here is a calc problem I have been having a hard time on.
Let
and let g(x) be an antiderivative of f(x). If g(5) = 7 then find g(1).
Solar