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GuestOct 3, 2013

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GuestOct 3, 2013

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Glad i could help

GuestOct 3, 2013

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Great reason. This helps a lot. Now I can do my homework...

GuestOct 3, 2013

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Well you see math is hard because it just is

GuestOct 3, 2013

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45 and its multiples (9*5=45)(15*3=45)
45 is the Lowest Common Denominator (LCD) of 9,5, and 15

GuestOct 3, 2013

+118727

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There are 3 numbers in the middle. I started by assuming that the biggest 3 were going to be in the middle
I draw the triangle with circles where the 15 numbers would be. Since the smallest sum was required I put 1,2, and 3 in the corners.
then I added one number to each side stating at 4 and working upwards. Each time I was careful to keep the sum of the sides as close in value as possible. So I added 4,5and 6 (checked the sum) then 7,8,and 9 (checked the sum) and lastly 10, 11 and 12 (checked the sum).
It all fell out rather nicely. I don't need to give you the answer. Have a play yourself.

MelodyOct 3, 2013

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Thank you very much cjjjj. Much appreciated.

GuestOct 3, 2013

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base 36 - google it "1BP49B 36"

GuestOct 3, 2013

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GuestOct 3, 2013

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GuestOct 3, 2013

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GuestOct 3, 2013

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Dude what this is dumb/stupid/and u are retarded/stupid

GuestOct 3, 2013

+118727

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6ab-(12ab-4ab) = 6ab+ -1(12ab-4ab) there is an invisible 1 between the minus sign and the bracket.

= 6ab+(-1)*12ab+(-1)*-4ab

= 6ab-12ab+4ab

= you can do the rest.

This is the full explanation but you can just remember that if there is a minus sign outside the bracket like this one all the signs inside the bracket get changed when the brackets are removed.
For example
-(-a+6-2g) would become a-6+2g

I hope that you can learn from this.

MelodyOct 3, 2013

+118727

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Just divide then ignore the decimal part of the answer.

MelodyOct 3, 2013

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8*3-(-4)+2-5
24-(-4)+2-5
28+2-5
30-5
25

GuestOct 3, 2013

+118727

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question doesn't make sense.

MelodyOct 3, 2013

+118727

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Your question is not complete
You need to say x = something. or f (something that isn't x)

MelodyOct 3, 2013

+118727

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-56 - (-34) = -56 - -34

if 2 + or - signs are so close to that you can put a circle around them without anything being in the way then,
if the signs are the same replace with a + that is ++=+ , and - - = +
if the signs are opposites replace with a - that is - + = - , and + - = -

you have 2 minuses so replace with a +

-56 + 34

MelodyOct 3, 2013

+118727

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V=5kg/10g/cm3

5000g/10g/cm3 = 500/cm3 but this doesn't make sense. You can't have cm3 on the bottom and no units on the top.

MelodyOct 3, 2013

+118727

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This is the sum of a geometric progression GP Do you know about those?

a=15
r=1.15
n= 200

s=a ( r^n - 1) / (r-1)

s= 15 * ( 1.15^200 - 1 ) / 0.15

sum of all the costs = 1.37 * 10^14 This is a very big number.

MelodyOct 3, 2013

+118727

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DEFINITELY -Do not put in t he zeros it is too easy to make a mistake!

the are 1000 mg in a gram.
(a milligram is smaller than a gram, so there will be more of them, so you need to multiple - I always go through this thought pattern when I am deciding whether to multiply or divide)

5.97 x 10ˆ(27) x 1000 mg

You can do this in your head, there are 3 zeros in 1000 so the exponent goes up by 3
5.9 x 10^30

or, on the calculator it is best to use the exponential button (REMEMBER NOT TO PUT THE 10x AS WELL)

5.9 exp 27 x 1000 = 5.9 x 10^30

MelodyOct 3, 2013

+118727

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Just think about each side side separately

There a 4 isosceles triangles, all the same, and 1 square base.

Hopefully you know how to find the area of the square.

Each triangle is 1/2 x base x height (the height is the slant height of the pyramid)

If you are not given the slant height you will need to work it out using the base the perpendicular height and pythagoras' theorem.

MelodyOct 3, 2013

+118727

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You don't use a common denominator when multiplying, that is only for adding and subtracting fractions.

You can do it straight off on a calculator.

If doing it by hand you will need to know that a positive times by a negative is negative.

then multiply the top for the top (numerator) 9x3

and multiply the bottoms for the denominator. 11*23

MelodyOct 3, 2013

Oct 2, 2013

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-56+34
-(56-34)
-(22)

GuestOct 2, 2013

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