Question

a store sells one model of bicycle for 150.what is the variable expression for the amount of money the store will receive if it sells b of theses bicycles.??

Answer 1

If it sells one bicycle, then the store receives 150* 1=150 dollars.
If it sells two, then the store receives 150*2=300 dollars.
In general, if the store sells b bikes, then it receives 150*b dollars.