At practice, Tom does three times as many push-ups as Justin, and also 50 jumping jacks. He does 72 exercises in
total. The equation 3x + 50 = 72 describes this situation. What does the variable z represent?

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

i believe the correct answer is option 4.principalities were small territories that were run by russian rulers.

which statement correctly defines principalities in northern asia in the 1200s? principalities were small territories that were run by russian rulers.

hope i could ! : )