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
Answer:
negative pie/10 radians
Step-by-step explanation:
d on edg
Combine like terms
9r+r=10r^2
7b+b=8b^2
10+10r^2+8b^2+4n
Answer:
-10.7
Step-by-step explanation:
Step-by-step explanation:
you may need to show what the graphs look like.
