Between 0-99 the greatest number of prime numbers end in which digit 0,1,2,3,4,5,6,7,8 or 9

In a school 2/3 of the students study a language of those who study a language 2/5 study french

What is the solution to the equation? k/6.4=8.7 2.3 5.568 15.1 55.68

If you apply the changes below to the linear parent function f(x)=x what is the equation of the new function vertically stretched by a factor of 3 flip over the x axis