Subtract. Express your answer in lowest terms 10 2/5 - 3 4/5

In the diagram below, tan θ = sqrt 3. what is the value of m?

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.

Can someone me with the property questions for 12 13 and 14 plz