Question

Professor baker wants to mix a solution of 15% acid with one containing 20% acid to get a 25 ounce solution containing 16% acid. how many ounces of the 15% solution should the professor use?

Answer 1

He is a professor he should know the answer :)

Answer 2

I was going to write that @Boblovesmath

Answer 3

hahahaha :P

Answer 4

grrrrr

Answer 5

i really need help

Answer 6

I think you can solve this using systems of equations, but I really don't know how though.

Answer 7

@citycowgirl99 go on facebook, there is a group called mathematics. Try to join them and ask them this question. I am sure they can help you.

Answer 8

okay, thanks

Answer 9

you have 2 totals, one for ounces of solution and one for acid.

the trick is to be able to write them out and then solve for what's needed.

first, define your variables. these will always be the things you want to find.

let x = ounces of 15% acid solution and let y = ounces of 20% acid solution.

then

x+y = 25 (this is the total number of ounces of solution)

.15x+.20y=.16(25) (this is the total amount of acid)

then just solve using substitution, elimination or anything else used to solve a system of linear equations.

Answer 10

;-; so whats the answer

Answer 11

seriously?

Answer 12

yes

Answer 13

i'm here to help but not to do your work

Answer 14

if you're not here to learn, you may want to go to another site. read the code of conduct (below, left).

Answer 15

@pgpilot326 is it 4?