please help meh i suck at math

In a class, there are 12 girls. if the ratio of boys to girls is 5: 4 how many boys are there in the class

Which graph represents the function f(x)=4[x]?

According to the national center for health statistics, in 1990, 28 % of babies in the united states were born to parents who were not married. throughout the 1990s, this increased by approximately 0.6 % per year. if this trend continues, in which year will 52 % of babies be born out of wedlock? in__52 % of babies will be born out of wedlock