In this line of ,the ratio of red circles to blue circles is 1: 3 , how many more red circles would need to be added to make the ratio of red to blue 3: 1

8 more red circles because if you have 9 red circles and 3 blue ones the ratio would be 9:3 and if you simplify that down to 3:1 that’s the answer. So you would need to add 8 more red circles

if you need just tell me and i will come to the rescue.

step-by-step explanation:

x-150=475   x=625

step-by-step explanation:

if the bike after the sale ($150) is $475 then just simply add 150 to 475.