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This is essentially a guessing game!.

I will assume that highest mark is 100. Since Alan's mark is 80 more than the lowest mark and is 3 times Chris's mark, that means his mark must be divisible by 3. Hence, his mark must one of the following numbers: 81, 84, 87, 90, 93, 96, and 99. By trial and error it appears to be 93.

Chris's mark =93/3 =31. Brian's mark must be 39, the same two digits as Alan's reversed. And David's mark must Chris's mark reversed, or 13. And the difference between the highest mark, or Alan's 93 and David's 13 =80.

R.I.P Declan

Ok so first of all write the equation for the area of the circle

Area=pie*(radius)^2

Now subtitute the values

615=pie*(radius)^2

615/pie=radius^2

sqrt(615/pie)=radius

radius=13.9 or if 1 d.p then 14

Downgrade or drop cable

Get a roommate

Downgrade cell phone service

Eat out a LOT less

Drive less

Save less (this is not a good one)

Use coupons when grocery shopping

Lower the thermostat in winter ...raise it in summer

Call GEICO     Haha

He could also increase his income by working more hours or getting a second job (Uber?)

This is the formula you would use to calculate this. 6% is assumed to be compounded monthly.

FV=P{[1 + R]^N - 1/ R}

FV =500 x ({[1 + 0.06/12]^(30*12) - 1} / [0.06/12])

FV =500 x         ( 5.0225752                 / 0.005)

FV =500 x                          1,004.52

FV =$502,257.52 - The balance in your account after 30 years @ 6% comp. monthly.   

Thx dude That problem really stumped me

Just to be clear:

Image = Codomain  

It's just the way we call it in french...

8888888+33333333= = 42222221

Easily inputed into the calculator...

−40/45 ​​+1.875=-40/45+1875/1000=-40/45+15/8=71/72

I'm going to take into consideration that these are two separate terms.

-40/45 = -40/45 = -0.8888888888888889

Add that to 1.875 and you'll get:

0.9861111111111111 = 71/72

Well -40/45+1.875 is something we can type into a calculator, and in doing so we get...
-40/45+1.875 = -0.8888888888888889+1.875 = 0.9861111111111111...
In fraction form, this is 71/72, which of course is much easier to write or type. 

71/72 OR 0.98611111...

I don't think that is the correct answer(I Think)

The probability that a 10-sided die rolls a prime number is (4/10) = (2/5)  since the primes it can roll are 2, 3, 5, and 7. We can choose which dice show a prime number in 4C2 = 6 ways. Then, there is a  chance that the chosen dice will actually roll a prime number and the other dice won't. Therefore, the total probability that exactly two dice show a prime number is 6 * 36/625 = 216/625 .

Art of Problem Solving Solution @above

My solution:

Do what CPhill did, C(4,2) * (.4)^2 * (.6)^2 = 216/625.

I answered a VERY similar question as this yesterday:

I think the formula you need  is:

For the FIRST card   P = 6230

A = P( i (1+i)^n / ((1+i)^n-1)    A = monthly payment   n = 36 payments   i = periodic interest in decimal = 20.4/12=.017

For the SECOND card  P = 2960   i = .0234 

Substitute into the equation for EACH card then add the results together for her total monthly payment ...

Got it?    Need more help?

I assume that you have the formula in your textbook for calculating these payments:

The monthly payment on her Electronics Boutigue credit card will be =$232.80 per month.

The monthly payment on her Misc. Goods credit card will be              =$122.60 per month.

Her total monthly payments on both credit cards will be: $232.80 + $122.60 = $355.40 per month.

Thanx for the confirmatio, Chris.....I'm a little weak at probability and statistics, hence I did not include my calculations.....but they were correct (THIS time).....so I 'guessed'  ....  some day I will be up to speed !

a bag contain 15 white beads and 12 black ones. If i take two beads out of bag at random, one at a time and without replacing first, find probability thaat both are the same colour

total amount  =  15 + 2.50x     where x is the number of rolls of film  developed....so we have.....

15  + 2.50 (5)   = $27.50

Seriously... If you aren't gonna ask a math or relevant question why are you on here. You should know why your pants are wet..how would we know.

P (two whie)  =  15/27 * 14/26  =   35/117

P(two black)  =  12/27 * 11/26  =    22/117

So....the total probability  =  [35 + 22]  / 117   =   57/117  = 19/39  ≈  48.7 %

Just as EP found.....!!!

P (two whie)  =  15/27 * 14/26  =   35/117

P(two black)  =  12/27 * 11/26  =    22/117

So....the total probability  =  [35 + 22]  / 117   =   57/117  = 19/39  ≈  48.7 %

3 - 3 x 6 + 2 =

3 - 18  + 2  =

-15  + 2  =

-13

Verified here :

http://www.wolframalpha.com/input/?i=3+-+3+x+6+%2B+2

The other answer is wrong, kinda at least. 

While 45% of 80 are indeed 36 BUT 45% does not equal 0.045 it equals 0.45. 

0.045*80 is 3.6 

whereas 0.45 is 36.

Picture percentages like this:

100% of something is just the something so it's 1 something.

100%=1

thus 50%, half of it, equal 0.50,

the pattern continues.

1%=0.01, a hundredth of something.

1.77245385091 but approx. 1.7725.