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Thank you for the reply. I'm Dutch! I'm kind of fluent in English but sometimes the terms I use aren't really correct to use in math, sorry for that. Also a. and d. were easier than I expected, I should've thought more about it haha

What's your language?

Oops that was accidentally! Really, thank you for the reply! And yes, I did get it. I'm kind of bad with calculators but I did the π * 6,52 seperately and then divided 118 by that and then took the square root of 5,9. A bit of a workaround but I got the answer :)

Hi guest,

Did you really intend to cross out. "Thanks for the reply"  ???

Did you get the same answer as Omi did?

Thanks for the reply! When I use the calculator and take the square root of it, I get a different outcome though. Am I doing something wrong?  Nevermind haha, I did it seperately now and got it

Ahh I see where I went wrong. Thank you so much!

I have a cylinder made from metal. It has a mass of 345 grams, a height of 6,52cm and a volume of 1,18 * 10-4 m3. What is the diameter?

Could anyone check if these are correct?

2. is correct !

1.

\(\begin{array}{|rcll|} \hline 0.1x + 0.01 (x - 10) &=& 110.9-x \quad | \quad \times 10 \\ 1x + 0.1 (x - 10) &=& 1109-10x \\ x + 0.1x - 1 &=& 1109-10x \\ 10x +x + 0.1x - 1 &=& 1109 \\ 10x +x + 0.1x &=& 1110 \\ 11.1x &=& 1110 \\ \\ x &=& \dfrac{1110}{11.1} \\ \\ \mathbf{x} &=& \mathbf{100} \\ \hline \end{array}\)

How many distinct triangles with positive integer sides have perimeter equal to 12? 

I assume, the answer is 3 (2,5,5) (3,4,5) (4,4,4)

The answer is 3.

There are 19 pairs of integers.

There are 12 pairs of integers.

The number of solutions to f(f(f(x))) = f(x) is 4.

The maximum distance is sqrt(47).

Thank you, Melody !

Sometimes there is not doubt milkcloud.

It is the asker of the question, artszeilani, who holds the trump card for rudeness.

1. CZ = sqrt(16^2 - 8^2) = 8 sqrt(3).

2. AE = (6 - 4*4)*3/2 = 15/2.

Thanks Heureka,

That was so easy but I never would have got it if you had not shown me first.   

The complex numbers a and b satisfy a*[conjugate b] = -1+5i

find [conjugate a]*b

\(\begin{array}{|rcll|} \hline a*\overline{b} &=& -1+5i \\\\ \overline{a*\overline{b}} &=& \overline{-1+5i} \\\\ \overline{a}*\overline{\overline{b}} &=& \overline{-1+5i} \quad | \quad \overline{\overline{b}} = b \\\\ \mathbf{\overline{a}*b} &=& \mathbf{-1-5i} \\ \hline \end{array} \)

You are none too bright milkcloud.

There is NO doubt whatsoever! This post was changed less than three minutes after the answer was posted.

Any rudeness is all on Artsyleilani.  It would be easy for Artsyleilani to repost the original question.

Thanks Tetre,

I think that is all of them....

unkonzentriert =  inattentive, unfocused, lacking in concentration.

Das ist ein neues wort für mich.   Danke Omi      

“Well that’s a bit rude, why not give her the benifit of the doubt?“

edit: I’m so sorry (for saying what I said at the top)!!! I didn’t notice that she changed her question immediately after an answer was posted 😥😥

hmmmmm, try visualizing by drawing Venn Diagrams

For number 2.

You have to use similar triangles.

Sorry I ran out of time gotta go 

also, why is "help me please" in the top of Sticky Topics?