Question

black and white paint are mixed to give a shade of grey in the ratio 5:2. write an equation for y in terms of x to show the relationship between the amount of black paint (x) and the amount of white paint (y)

Answer 1

i think its y = 2.5x ?

Explanation:

for every 5 units of black paint, there are 2 units of white paint,, this can be represented as

2y = 5x

divide everything by 2 to isolate y and you get

y = 2.5x