What is the value of x (Khan Academy question)

If a boat travels 3 miles in 1.5 hours how far will it travel in 2 hours?

Twenty points. suppose that one doll house uses the 1 inch scale, meaning that 1 inch on the doll house corresponds to 1/2 foot for life-sized objects. if the doll house is 108 inches wide, what is the width of the full-sized house that it's modeled after? in inches and feet

Write 5(6x+4)-2(5x-2) in the form a(bx+c) where a,b and c integers and a> 1