a bicyclist traveling at an average speed of 18 km/h takes 3 hours and 30 minutes to complete his journey. How many hours less will he take if he bicycles at a speed which is 3 km/h faster

It will take him 0.5 (30 minutes) less hours if he bicycles at a speed that is 3km/h faster.

Step-by-step explanation:

18 km/h x 210 minutes = 3,780

3,780/21km = 180 minutes = 3 hours

If we multiply the speed by the time we can find the distance, using that we can find the time it takes to travel the same distance with more speed (21km/s this time).

Therefore, it will take 30 minutes less if he travels 2 km/s faster or 0.5 less hours

I hope this helps!

english, cause i can’t you

solve systems of equations by graphing. a system of linear equations contains two or more equations e.g. y=0.5x+2 and y=x-2. the solution of such a system is the ordered pair that is a solution to both equations. to solve a system of linear equations graphically we graph both equations in the same coordinate system