Choose all the equations which are correctly solved. x^2– 5x + 5 = 0 {2,3}

x^2 – 7x - 8 = 0 {-1, 8}

x^2 + 12x + 20 = 0 {-2, -10}

x^2 – 3x – 10 = 0 {2, 10}

x^2 + x + 20 = 0 {4,5}

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.