Answer:
The amount of yellow paint needed to prepare 5 gallons of green paints is
gallon .
Step-by-step explanation:
Given as :
The ratio of yellow paint to blue paint = 3 : 7
The total measure of green paint prepare with blue and yellow paint = 5 gallons
So, Let The amount of yellow paint = 3 x
And The amount of blue paint = 7 x
According to question :
The amount of yellow paint + The amount of blue paint = The total measure of green paint
Or, 3 x + 7 x = 5 gallons
Or, 10 x = 5 gallons
∴ x =
= 
so , The amount of yellow paint = 3 ×
=
gallon
And The amount of blue paint = 7 ×
=
gallon
Hence The amount of yellow paint needed to prepare 5 gallons of green paints is
gallon . Answer