Help! I’ll give brainlist if u have the correct answer!

Asap (explain how you got it as well for brainliest)i tried 1: 2 and 2: 3 and they were wrong. picture of figure: in the figure below, the segment is parallel to one side of the triangle. the ratio of 12 to y is1: 21: 31: 42: 3

How much dextrose 70% must be mixed with dextrose 5% to prepare 1,000 ml of dextrose 20%?

Yesterday i ran 5 miles. today, i ran 3.7 miles. did my percent increase, decrease or is it a percent error? plz i need