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Is this a question you made up?

\((a+b)^{-1}(a^{-1}+b^{-1})=\frac{1}{ab} \)

the question has already told you that the remainder will be 2 when it is divided by n.

That is what mod means 

  mod means remainder.

Realize that   tan = opposite / adjacent

   so for this picture   

                     tan 12^o  = AC/44       solve for AC      ( you will need a calculator ...or slide rule !  HaHa...)

I hope so too.   

In the meantime, sign your wanted username at the end of your guest posts.  We will get to know who you are.

https://web2.0calc.com/questions/help-no-idea-how-to-do

I was going to give you a snide comment about asking other people to do all your homework for you.

But instead I will answer one and you can doo all the rest yourself

let 𝑓(𝑥)=𝑥^2+4 and 𝑔(𝑥)=6𝑥+7. Evaluate the following:

𝑓(𝑔(0))=

g(0)=6*0+7=7

f(7)=7^2+4=53

p = 2/3 e       costs given

(p x)    = 4  e ( 35-x)

2/3 e x = 140 e  - 4ex

4 2/3 ex = 140 e

4 2/3x = 140

x =   140 / (4 2/3) = 30   = number of pencils       

check:      30 p   =  5 e    * 4

               30 * 2/3 e   = 20 e

                       20 e = 20 e      Yes .....

Similar question:

https://web2.0calc.com/questions/coordinate-question_8

See if you can figure this one out using the same methodology  .....

k - 2/7 k = 140     k = 196 originally

     196 - 140 = 56 given to James

100 - 56 = 44 dollars is what James originally had

Plz help me

(8/5)/(3/4)

Flip the 3/4 and turn the / to *

(8/5)*(4/3) = 32/15

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I can't see the question.

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Me too

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ohhh, I was a bit confused on what it meant by "write an equation"

That makes a lot more sense that 21=21 lol

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I appreciate it

You're welcome. :))

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Thanks

Thank you

x is an alternate interior angle, so it's the same as 21 degrees. 

21 = 21

Hope this helped :))

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Alternating angles are =     x = 21 degrees

or the sum of the angles in a triangle = 180  

the other angle near A = 90 - 21 = 69^o

then   69 + x + 90 = 180^o

            x + 159 = 180

             x = 21 degrees

You're welcome. :))

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starts with  x dollars

then spends 420

now has  x - 420

  spends 1/4 of this leaving 3/4 of this :

(x-420) * 3/4   = 6/11 x    solve for x

3/4 x - 315 = 6/11 x

x = 1540 dollars initially

wait nvm i just entered it wrong

Thanks ~Hannah