Answer:
20
Explanation:
You would set up a proportion in order to solve this
3 green 12 green
------------ = ------------
8 total x total
Then you would cross mulitply for x and get 32. Since that is the total number, you would have to subract the 12 from 32 to get 20.
Three strength training exercises that can be performed by adults at an average fitness level are:
Squats: Squats are particularly effective exercises because they allow you to work your legs, core and upper body simultaneously. They also allow you to add weight progressively through the use of dumbbells.
Planks: Planks are a type of exercise that accelerate strength training. They allow you to use your hands, sides and forearms. They also help you exercise your core, which is the basis for many everyday movements.
Rows: Rows are good exercises because they target the muscle groups that we do not engage often. These are our back muscles, which suffer greatly from sitting at a desk or hunching over a computer. Rows help improve posture and prevent back and shoulder problems.
Strength training leads to many benefits, including stronger muscles, bones and joints that help support your movement and reduced risk of injury during training.
