How to convert 8.1 into a fraction

Will used 20 colored tiles to make a design in art class. 5/20 of his tiles were red. what is an equivalent fraction for the red tiles?

Which part of a 2-column proof is the hypothesis of the conjecture? a) given b) reasons c) prove d) statements ! i think it's b but i'm not quite

Which value of m will create a system of parallel lines with no solution? y = mx - 6 8x - 4y = 12