If 5 apples cost $2, how much do 8 apples cost?

Calculate: ( \frac{5}{6} - \frac{1}{3} )

( 2x + 5 = 17 )

A map scale is ( 1 : 50,000 ). Two towns are 4 cm apart on the map. Find real distance in km.

( \frac{x}{5} = 9 )

A square has perimeter 36 cm. Find its side length and area.

What is 15% of 200?