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I'm just looking for a bit of explanation as to right angle triangles

GuestSep 17, 2013

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10 presents can be ordered in 10! different ways;
presents can then be grouped 1-2, 3-4, 5-6 and so on
however, "double counting" happens in two ways -
one ... in each group of 2 there is double counting by a factor of 2! .
two ... the groups are double counted in 5! different ways.
the answer = ((10!)/(((2!)^5)*(5!)))
in general ...
for n items
and k items per group
where n=km
the formula is:
((n!)/(((k!)^m)*(m!)))
... i think? :(

GuestSep 17, 2013

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The ratio of arc length to radius for a circle, gives the angle θ in radians ie θ = a/r
so here θ = a/r = 250/4000 = 1/16 = 0.0625 radians

GuestSep 17, 2013

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(1/2) * (5/8) = 5/16 = 0.3125 or
0.5 * 0.625 = 0.3125

GuestSep 17, 2013

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question is perhaps a little unclear?
g(x) = x - 2^(1/2) = x - 2^0.5 = x - 1.414213562373095
so g(x) is ...
the equation of a straight line
slope = +1
y intercept (where x = 0) = -1.414213562373095

GuestSep 17, 2013

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yes
atan(x)
see trigonometry under help ...

GuestSep 17, 2013

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question a little unclear?
(157/154) = 1.0194805194805195 ...

GuestSep 17, 2013

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8h^2+36h+16 =
4(2h^2+9h+4) =
4(2h+1)(h+4) ...

GuestSep 17, 2013

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(2^3) * (3^5)
= 1944

GuestSep 17, 2013

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11/12*4/9 is ambiguous?
add some brackets to make it clear
is it (11/12)*(4/9) or 11/(12*(4/9) and so on?
pump it into web2.0calc, shuffle a few brackets until you get what you want?

GuestSep 17, 2013

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108,000,000 = 1.08 x 10^8 - = 1.08E8 ?

GuestSep 17, 2013

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be more specific?
perhaps ..
move left (-ve) one step ie -1
move right (+ve) three steps ie 03
from where you're now standing?
you end up ...
two steps (02)
from where you started?

GuestSep 17, 2013

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you need to list some of the actual questions/issues?
what specific triangle calculations?

GuestSep 17, 2013

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let point (x1,y1) = (3/5,5)
let point (x2,y2) = (6,1)
slope =
opp-side/adj-side =
(y2-y1) / (x2-x1) =
(1-5) / (6-(3/5)) =
-4/(5+2/5) =
-4/(5.4) =
-20/7 =
-0.740740 ...

GuestSep 17, 2013

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35 = 1 x 35 = 5 x 7
factors (1, 35) and (5,7)

GuestSep 17, 2013

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GuestSep 17, 2013

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how make 15 + (22/4) = 6 ?
use modulo arithmetic
eg ...
15 + (22/4) = 15 + 5.5 = 20.5
with 20.5 take the floor = 20
then do (20 modulo 14) = 6
or ...
with 20.5 take the ceiling = 21
then do (21 modulo 15) = 6
where
modulo is an arithmetic operator?

GuestSep 17, 2013

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(14*7)*X = 14*(7*X)
shows the property of "associativity" for *
more generally, the associative law for operator *
says for any X, Y, Z that (X*Y)*Z = X*(Y*Z)

GuestSep 17, 2013

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-1/2 - 1/4 = -2/4 -1/4 = -3/4

GuestSep 17, 2013

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((floor((127/22) + 0.5)) * 21) = $126
more generally ...
NDVD = number of dvd's
RHOLDS = number of dvd's held per rack
PDVD = price of a single dvd
CRACKS = cost for racks
CRACKS = ((floor((NDVD/RHOLDS) + 0.5)) * PDVD)

GuestSep 17, 2013

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GuestSep 17, 2013

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there is likely a countably infinity of real solutions?
however, if you simply stay with integer solutions
clearly, there is no "square" solution
for a rectangle of height H and breadth B and perimeter P
H = ((P- (2 * B))/2) where here P = constant = 78
eg
B ... Rectangle ... P
1 ... (1 x 38) ... 78
2 ... (2 x 37) ... 78
3 ... (3 x 36) ... 78
4 ... (4 x 35) ... 78
and so on ...

GuestSep 17, 2013

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GuestSep 17, 2013

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Wow I knew is in kindergarten!
It is obviously 11!

GuestSep 17, 2013

Sep 16, 2013

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Pi is never ending, it's digits go on forever.

GuestSep 16, 2013

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