Travis needs to mail 4 letters and 10 postcards. a letter needs a 37-cent stamp and a postcard needs a 25-cent stamp. how much money will travis spend for postage?

398-cent stamp for postage.

Step-by-step explanation:

For one letter, Travis needs                        37-cent stamp

For four letters, Travis needs                      37-cent stamp x 4 letters

                                                                   = 148-cent

Again,

For one postcard, he needs                        25-cent stamp

For ten postcards, he needs                       25-cent stamp x 10 postcards

                                                                   = 250-cent

Therefore, he will spend = (148-cent + 250-cent) = 398-cent stamp for postage.