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can anyone in this comment/question/announcement do trigonometry? i was sick when we started talking about it so its a bit confusing.

the answer is seven

too many people just use this to chat or say hi like you all said, and it gets annoying. i don't like having to search through a bunch of anonyous hellos to find a question   

Thanks!

it would be (x-4)   

I think that the main reason people find maths hard is that it is always buiding on the knowledge that the student is expected to already have.  Unfortunately people often do not have the pre-knowledge that they need in order to understand and achieve.

I coach kids privately and I hardly ever do what they are doing at school.  I build their basic knowledge that they are usually expected to already have and in so doing their confidence is boosted and all of a sudden they realize that it is worth listening in class.  They really can understand what the teacher is talking about. Then they can start really improving!

So it is mostly about pre-knowledge and confidence.

Math isn't hard per se, you dertermination (and just a bit of logic) are what can make a subject hard or easy. For example, I try my best in my Calculus class and do well in it. As for AP European History, I hardly put ant effort and do not as great. 

24/4=6, or 24*0.25=6. the answer is six.

what is four less than an unknown value in math terms please

I believe that you would just divide 302.325m² by two thus giving you two equal halfs.

302.325 / 2 = 151.1625

Just use the correct units and done.

Hope this helps (○’ω’○)

D**n, son. Btw hes right

what is its height

I cant choose... maybe the dark side cause they got money and I can retire early... Im only 15 so that will be a while tho.  lol

No the calc is not wrong.

It is a matter of interpretation.

Some calcs will give the answer that you want but most will say that  -5^2=-25

What the calc is interpreting is

-5^2=-1×5^2=-1×25=-25

Consider  26-5^2

If the calc interpreted this the way you want the answer would be 26+25=51 which is obviously wrong.

Of course 

(-5)^2 = 25

Yes. You are right, It is 25.

Because of the convention in the order of assessing operations, exponential expressions are evaluated before addition or subtraction. The squaring is done before the sign change.

If the term is enclosed in parentheses, then squared, the answer will be correct.

ok, thank you very much.  

Yes. -5^2 is the same thing as -5*-5.

That means the number would be positive.

I believe closing the term with parenthesis fixes this problem on most calculators.

Have you tried it yourself buddy?

Also, you could have just googled this, and used the calculator instead of asking a forum for a quick answer.

You literally type in 15+15+13+12 and it will give you the answer.

I suggest you try it on your own though, so you actually learn. Knowledge of Math is important. Especially addition.

N!  =  N * N-1 * N -2 *...... *3 * 2 * 1

So.....for instance...

4!  = 4 * 3 * 2 * 1     = 24

And

5!  = 5 * 4 * 3 * 2 * 1 = 120