Find the ratio for tan X

Which is equivalent to 10/12? options: 10/18 5/6 3/12 9/11

Some boys and girls were asked if they had a pet. one third of the group were boys. there were 20 boys. 20% of the girls had a pet. boys with a pet : girls with a pet = 1 : 5 i need to know how many girls there are.

Solve each quadratic equation by factoring and using the zero product property. x^2 - 8x + 30 = 3x