Whats the answer to these pls help

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

Aquadratic equation in standard from is written ax^2= bx+c, where a,b and c are real numbers and a is not zero?

The frequency table shows the results of a survey comparing the number of beach towels sold for full price and at a discount during each of the three summer months. the store owner converts the frequency table to a conditional relative frequency table by row. which value should he use for x? round to the nearest hundredth. 0.89 0.90 0.92 0.96