Do inequalities always have infinite soultions. if so why and if not why not?

Solve the following inequalities and show the solution on a number line. 2x+3< 3(4x+5)

Clarence wants to buy a new car. he finds an ad for a car that costs 27,200 dollars. suppose his local sales tax is 7%. -how much would he have to pay? -what is the cost of the car including tax? -if clarence has 29,864 saved, can he pay cash to buy the car?

What is r i 4.5+10r=-6.5 with work pls