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0/0 is undefined in mathematics, though some calculation software will give it a default value of zero in order to allow further calculations to take place!

No number is divisible by 0.  There is no answer,  this is supposed to be a trick question.

0/0 =0

0/0=0

-3/8 divided by -9/10

Thanks, Hailey......here's a fractional answer...

(-3/8)  / (-9/10)  invert he second fraction and multiply

(-3/8) * ( 10 / -9)  swap denominators

(-3/-9) * ( 10/8)  =

(1/3) * (10/8)  =

10 / 24  =  

  5 / 12

-3/8 divided by -9/10 is (-3)/8 = -0.375 divided by (-9)/10 = -0.9 soooo... the answer is (-0.375)/(-0.9) = 0.4166666666666667

24f + 18(1 - f) = 22 where f is fraction of the 24% moisturiser

6f + 18 = 22

f = 2/3

2/3 of 12 is 8 so you need 8oz of the 24% stuff and 4oz of the 18% stuff to make 12oz of 22% moisturiser.

A jar of face cream contains 18% moisturizer, and another contains 24% moisturizer. How many ounces of each should be combined to get 12oz of a cream that is 22% moisturizer

Let the number of ounces of the 18% moisturizer  = x     so.......the number of 24% moisturizer  =  12 - x

And

(The number of oz of 18% product)* its concentration + (The number of oz of 24% product)* its concentration  = 

(The total number of ozs of product) * its concentration......mathematically, we have

(x)(.18)   + (12 - x) (.24)   =   (12)(.22)    remove the decimals by multiplying each side by 100

18x   + 24(12 -x)  = 22 * 12

18x  + 288 - 24x  = 264    

-6x + 288  = 264    subtract 288 from both sides

-6x  = -24     divide both sides by -6

x = 4 oz       this is the amount of 18% moisturizer that should be used

And  12 - x   = 12 - 4  = 8 oz   = the amount of 24% moisturizer that should be used

Here are just a few of them for you!

α ≈ 1.05739903452703...
α ≈ 2.17883595173276...
α ≈ 6.97307249503624...
α ≈ 8.80926556614570...
α ≈ 13.0456763332795...
α ≈ 15.2860747705649...
α ≈ 19.1889359218181...
α ≈ 21.6954025628196...

Multiply 83 by 15 percent in decimal form.  15%=0.15

83 * 0.15 = 12.45

12.45 is your answer.  I hope this helps!

@-Happy7

No and i wont tell you where she is its her buissness

12.45.

Actually, chalk it up to calculator imput error ^^.

I simplified (using properties of phi) and got (s²/4)*(sqrt(5+2sqrt(5))+(sqrt(10+2sqrt(5))))​. Tested with sides of four this produces the same result as the normal formula.

Which presents a different question:

Without using trigonometry, how would one simplify the above function to the normal function. For reference, here is standard area function: (s²/4)*sqrt(5(5+2sqrt(5)))

There are an infinite number of solutions.  Which one(s) are you interested in? 

245 factors as   49 * 5   =   7 * 7 * 5

This shouldn't be too surprising.....note

10^[ (3n /10) ] =    [10^(3/10)]^n   ≈    [1.9956 ]^n      which is very close to 2^n

Note that when n = 2...... [10^(3/10)]^n / 2^n  ≈ .995

Note that when n = 10...... [10^(3/10)]^n / 2^n  ≈ .9766

So.......there is less than a 3% difference in the results when   0 ≤ n ≤ 10

To make a fraction,  put one answer over another number.   You must remember a fraction is another way of writing division... often a nicer,  neater way. 

For example,  your teacher gives you the problem 7 divided by 9.  You put 7 as your numerator,  on top.  You put 9 as your denominator,   on the bottom.  Whatever number is to the left of the division is your numerator,  your top number.  Whatever is to the right is your denominator,  your bottom number.  7 divided by 9 is the same as 7/9.

I hope this helps!  @-Happy7

Yes, welcome to the forum, GuestLikesCake! 

4.13×10^-8×0.04×10^5

Since we can multiply in any order, rearrange this as

4.13 * 0.04 * 10^-8 * 10^5   = 

0.1652  *  10^-3  =

1.652 x 10-4     [ in scientific notation ]

nice 

83.3333333333

i like pinnaple