A pet store has k tanks of fish. Each tank has 30 fish. Using k, write an expression for the total number of fish in the store.

This is the concept of algebra, given that the total number of tanks in a pet store is k tanks and the total number of fish in each tank is 30 fish. An expression form the total number of fish in the pet store will be:'

Total number of fish=[number of tanks]*[number of fish in each tank]

f (k) = k*30

f (k) = 30k

the answer is f (k) = 30k