Lo haria si pudiera que pena contigo
8.-12y^10 9.-15z^17 10.a^3b^3/125 11. 9x^2y^6/z^4
Answer:
61.25%
Step-by-step explanation:
How many ml of 20 percent acid should be added to pure acid
to make 70 ml of 30 percent acid?
:
let x = amt of 20% mixture
then
(70-x) = amt of pure acid
:
0.20x + (70-x) =0 .30(70)
0.20x + 70 - x = 21
= 21 - 70
-0.8x =-49
x = 61.25%
x = +61.25 ml of 20% stuff
We normally think of 3x7, but the "7" is one more than 2 widths ... double the 3 and halve the 7 ==> 6 by 3.5 works ...
well the name of the phase for that is called freezing. I think that's we have to look for, maybe not, but I hope I helped
