A=1
B=2
C=0.1
D=6.9

Almost got me with the 1% there.

Nice.

Materials A, B, C, and D need to be mixed to come to a total of 10 mL: A + B + C + D = 10.
Material A is 1 mL: A = 1
Material B is 20% of total mL: 0.2 x 10 = 2
Material C is 1% of total mL 0.01 x 10 = 0.1
Material D is rest of total mL 10 - (1 + 2 + 0.1) = 6.9

Assuming that the volumes of the components add up to the volume of the mixture (with real liquids this is not always the case), B, C, D are as listed in the previous answers, 2, 0.1 and 6.9. respectively. If this is something you are making in RL, however, measuring out A, B and C and adding D until you get 10 mL total may be a better approach than measuring all components separately, assuming D is the solvent component.

Thanks!

The mathematical correct answers were already posted a few times (A=1 mL, B=2 mL, C= 0.1 mL, D=6.9 mL) but those could be quite of from reality. For example if you have pure ethanol and mix it with water say 10 mL+ 10 mL you wouldn't get 20 mL because of something called "volume contraction". The mass stays the same but the volume is less then anticipated.

See https://www.carolina.com/teacher-resources/Interactive/chemistry-lost-volume-demonstration/tr10785.tr for further informations.

So to answer it completly we would need to know what materials you talking of AND if the % are mass percent of volume percent (because as you can see, its not always the same). :)

Thanks :3

Thx!

Thank you so much, good luck to you!

ty mate

I'm glad someone solved it, I hated math in school...

View attached image.

Danke :3

Merry Christmas and thank you for this opportunity!

Thank You !

Arithmetic! Math?
···sorry. The space translator has failed.lol

Thank you　🎄(*p'Θ'q)

i wish i knew math

No need for thanks, but you still got many, plus the help with that problem.
So, thank you very much, muchas gracias YuriDiculous! <3

tnx) gl hf all)