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1.  x = adult tix     revenue from adult tix = $ 7.5x

     (115-x) = kidz tix  revenue from kidx = $3.00(115-x)    

the revenues from BOTH tix added together = $ 678

7.5x + 3 (115-x) = 678

4.5x = 678-345

4.5x =333

x= adult tix = 74

2.   Pure silver amount  = x    x(31.48) =  cost of pure silver

      Alloy = 50 oz       50(22.35) = cost of alloyT

The two costs added together =  (x+50)(25.98)

31.48 x + 50(22.35) = (x+50)(25.98)

31,48 x + 1117 .5 = 25.98x + 1299

5.5x = 181.5

x= amount of pure silver = 33 ounces

3....similar to 2....let me know if you need more help....

Tickets for a school play sold for $7.50 for each adult and $3.00 for each child. The total receipts for 115 tickets totaled $678. Find the number of adult tickets sold?

Let the number of adult tickets=A

Let the number of children tickets =C

A+C =115

7.50A+3C =678, solve for A, C 

A =74 tickets

C =41 tickets.

KE =1/2 x 1,000 x 2^2=2,000 Joules.

Kinetic Energy = 1/2  m v^2

                         = 1/2 (1000)(2^2) = 2000 j    (kg-m^2/s^2)

Here's an alternative method of solution.

Since the angle at B is a rt angle, it follows that B lies on the semi-circle for which AC is the diameter.

Then if we have, in a circle, two chords AC and BD intersecting at X,

AX.XC = BX.XD and since XD will equal BX, it follows that BX^2 = AX.XC = 3.12 = 36 etc. .

Tiggsy

hi bro

also would like to make a function that best fits the experimental values, using the same 'level' of math. the experimental values appear to increase logarithmically(?)

Oh, well then I guess my math teacher taught us wrong.

On the calculator you can also use the  x^y   button :)

Ooh. Thank you for your explanations :D

x/25*10^9=7*10^9
x=(7*25)*10^9*10^9
x=175*10^18=175 trillions

 Please watch and learn MathNerd(version2.0) :)

What can be divided into 25 billion to get 7 billion EXACTLY?

25/7 = 3.5714285714285714

So the answer is

\(3.\dot57142\dot8 \quad billion\:\: times\)

This is a recurring decimal - it can be expressed exactly as a fraction.

So it is NOT an irrational number. It can and is an exact value.

The question stated 6% per annum compounded monthly

For Max's Math Smileys:

h) is grad smiley  (vector gradient),  so grad (gradient) on the left becomes grad (graduate) on the right.

i) is curl smiley (the vector cross product differentiation operator).

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(cont'd)(2)

16.  

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The 4th one is rly funny.....
"Nice belt!!"

Two more........ and  that's all.....!!!!!!

And my favorite :

Those last 2 are brillliant Chris.  :)

IDENTITY THEFT        LOLLOLLOL  hahaha :D

I'm going to copy that one and post it on other sites :))

Gonna post more after I have done my revision for Biology :)