In the old aquarium, 3 tablespoons of salt were used for 20 gallons. That's a conversion ratio of

That is, for every gallon of water in the aquarium, there was 0.15 tbsp of salt. So a 50 gallon aquarium, Ill should add

to maintain the salinity.
The car is traveling 3 meters second
Step-by-step explanation:
you divide 15 by 5 and you get 3
The constant in an equation would be the number multiplied to x,
In the equation y - 6.7x, the constant would be 6.7