Which statements are true? Check all that apply.
mco = 120°
MCB = 60°
m angle COB = 2(m 2CAB)
m angle COB = 120°
mZCOB = 1/2 (mZCAB)

Amerchant has coffee worth $60 a pound that she wishes to mix with 50 pounds of coffee worth $90 a pound to get a mixture that she will sell for $70 a pound. how many pounds of the & 60 coffee should be used?