What is this expression in simplified dorm? (-9/2)(4/6)

Two cyclists 84 miles apart start riding toward each other at the samen time. one cycles 2 times as fast as the other. if they meet 4 hours later what is the speed (in miles) of the faster cyclists

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

Solve the following inequalities and show the solution on a number line. 2x+3< 3(4x+5)