If 2x-3=10 then what does 2x=?

Franco wants to double the volume of the cone. what should he do?

Identify an equation in point slope form for the line perpendicular to y=3x+5 that passes through (4,-1)

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.