A number is squared, then doubled and then 4 is subtracted. The result is the original number. What could the number be? (Give answers to 2 d. p)

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

Jackie purchased 3 bottles of water and 2 cups of coffee for the family for $7.35. ryan bought 4 bottles of water and 1 cup of coffee for his family for 7.15. how much does each bottle of water cost? how much does each cup of coffee cost?

The variable in a relation who’s value depends on the value of the independent variable is called what?