Around the world 17 out of 20 people have brown eyes write this ratio as a percent

Can someone factor this fully? my friend and i have two different answers and i would like to know if either of them is right. you in advance. a^2 - b^2 + 25 + 10a

Write 5(6x+4)-2(5x-2) in the form a(bx+c) where a, b and c integers and a> 1

What fraction is equivalent to 0.46464646··· a. 46⁄99 b. 46⁄999 c. 46⁄100 d. 23⁄50