A football team receives a 5-yard penalty on one play and a 10-yard penalty on the next. Write a sum of negative integers to represent this situation.

-5 + -10.  This is the sum that expresses the total loss of yards on both plays which is equal to -15.

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