Which expression is equivalent to 36 + 42 ? Using the Greatest Common Factor (GCF)?

2 (18+ 21)
6 (6 +42)
3 (12+14)
6 (6 + 7)

Solve the system. -a+4b+2c=-8 3a+b-4c=9 b=-1 a.(0,11) ,-1,2) c.(1,1,-2) d.(2,-1,-1)

On saturday a souvenir shop had 125 customers.sixty four percent of the costumers paid with a credit card. how many costumers paid with cash?

Which one ? is the answer and how to find this answer