Joanne's Proportion Problems

19) The ratio of an objects weight on Earth to its weight on the Moon is 6:1. The first person to walk on the moon was Neil Armstrong. He weighed 165 pounds on Earth. How much did he weigh on the moon?

let x be his weight on the moon

He weighed 27.5 pounds on the moon.

3) Three tea bags are needed to make a gallon of iced tea. How many tea bags are needed to make four gallons?

let x be the amount of tea bags needed to make four gallons.

12 bags are needed to make four gallons.

16) A diagram measuring 20 cm long is reduced on a copy machine to 15 cm long. If the width of the original copy is 16 cm, what is the width of the reduced copy?