Are 2b+ b and 3b equivalent expressions?

yes

Step-by-step explanation:

2b+b=3b because2+1 = 3

the answer is yes

Step-by-step explanation:

yes it is equivalent expression because 2b+b and 3b have the same value and length or numerator which equals yes.

this is answer of 144 cubic meters

it will cost dollar $540

the living room is 3 which means if we divide 325/3 then we get $108

therefore if 1part of the living room cost $108 and 3 costed $325

then total 5part of the room will cost 5*108 which gives $540