Question

Solve this word problem. Please help!


A cosmetologist has a bottle of 7% hydrogen peroxide solution and a bottle of 4% hydrogen peroxide solution. The cosmetologist needs 300 milliliters of a 5% hydrogen peroxide solution for a hair dye. Write and solve a linear system to find how many milliliters of each solution the cosmetologist needs to mix together.

Answer 1

@zepdrix

Answer 2

@imqwerty

Answer 3

7% mean 0,7 g in 100 mL solution
4% ---- 0,4 g in 100 mL solution

the cosmotologist need 300 mL of 5% solution

Answer 4

do you know how you can making 5% solution fron 7% and 4% mixed ?

Answer 5

from - sorry

Answer 6

how many 7% and how many 4% will result 5% ?

Answer 7

for example

7+4=11/2=5,5% - not is right

how will get 5% exactly ?

Answer 8

i have no idea but u seem like u know what u are doing @jhonyy9

Answer 9

@bookish610 check please my answers here - hope will help you