Decide if the expressions in given below are equivalent.5x and x + 5 explain how you know

All per-unit concepts rely on ratios,meaning,to provide a type of measurement

If 10 men take 18 days to mow 60 acres of grass, how long will 15 men take to mow 80 acres?

According to modern science, earth is about 4.5 billion years old and written human history extends back about 10,000 years. suppose the entire history of earth is represented with a 10-meter-long timeline, with the birth of earth on one end and today at the other end.