The cost to mail a letter is a base charge of $0.42 plus $0.17 for each ounce. Write an expression to represent the cost for malling a letter that is wounces. Then find the cost for mailing a letter that is four ounces.
Expression: y=.17x+.42 x is the ounce y is the total cost
.17×4+.42= (IDK, I don't have a calculator with me, can you search it up on your own?) Hopefully this helps and sorry for my lack of answer for the second one.
