Question

MEDAL...


A certain paint is to be mixed with 3 parts yellow to 2 parts blue. Twelve gallons of mixed paint are needed.

How many gallons of blue must be used?

4
4.8
7.2
10

Answer 1

@ash2326 @electrokid help?

Answer 2

4.8

Answer 3

u need explanation @iribeiro1602

Answer 4

ratio of yellow and blue is 3:2 that is in 5 gallon paint 3/5 part is yellow and 2/5 part is blue
so in 12 gallon blue=(2/5)*12
=4.8

Answer 5

\[
\frac{\rm yellow}{\rm blue}={3\over2}\\
{\rm yellow}+{\rm blue}=12\\
{\rm yellow}+{3\over2}{\rm yellow}=12\\
\frac{2{\rm yellow}+3{\rm yellow}}{2}=12\\
5\times{\rm yellow}=12\times 2\\
{\rm yellow}={12\times 2\over5}=?
\]

Answer 6

now, that we have the amount of "yellow",
the amount of "blue"=12-"amount of yellow"=?