Answer for p=2l+2w for l

(hurry! ) which expression is equivalent to the following complex fraction?

Which of the following is the equation that says that the product of a number and ten is equal to 20 percent of that number ? a) 10n= 2.0n b) 10+n=.20n c) n+ .20n=10 d) 10n=0.20n

Which best explains why this triangle is or is not a right triangle ?