Can you please help me?

You can find the constant of proportionality by finding the ratio of

If a || b and e || f , what if the value of y ?

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?