Which expression is equivalent to 64a6b7c9? BRES
o 2abc4a2b8c
o 4a²b2c (PVD
o Baºb°c (be)
8a%bc%(1/6)
Foid(0);

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