There are 21 wheels at the bike shop. The wheels

will be used to build tricycles and bicycles. There

will be half as many tricycles as bicycles. How

many of each type of bike will be built?

6 bicycles and 3 tricycles

Step-by-step explanation:

bicycles have two wheels therefore 6*2=12 total wheels

tricycles have three wheels therefore 3*3=9 total wheels

add the totals up and you have 21 total wheels