Bryan has 3 nickels, 3 dimes and 2 quarters what fraction of coins is either a dime or a quarter

Me because some of question i don’t understand

Tim's phone service charges $23.06 plus an additional $0.22 for each text message sent per month. if tim's phone bill was $28.56, which equation could be used to find how many text messages, x, tim sent last month?

The vet charges $45 for an office visit and $10 for each vaccination your dog needs. write an eaquation