21.25% because 85/400 = .2125 which is 21.25%
Unlike terms displays terms which are not the same. x+2y would be the answer.
Answer: 3rd one
Rearrange the original equation so it fits the model of : ax^2+bx+c=0
Then use the quadratic formula to find all possible answers.
33: 21 ...........................................
-0.24 should be the answer. idk i might be wrong. im not to great at math just i just used a calculator