He needs 6 litres of the 20% and 2 litres of the 60% a simple trial and error method will do in this type of equation
It’s in many different forms:20 or .20 or 20%
The answer is line c, because you have to rise 5 and run 2.
Supplementary angles are angles that add up to 180 degrees
Answer = 180 - 142 = 38 degrees
4x + 10y
Hope it’s right
Best luck with your studying
