Helllpp please

A. 12.7

Step-by-step explanation:

If line a is parallel to line b, therefore,

(10x - 13.3) = (8x + 12.1) => alternate interior angles theorem

Solve for x

10x - 13.3 = 8x + 12.1

Collect like terms

10x - 8x = 13.3 + 12.1

2x = 25.4

Divide both sides by 2

x = 25.4/2

x = 12.7

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