If 50% of a number is 20 then what is 75% of the number

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

Alicia puts $400 in a bank account. each year the account earns 5% simple interest. how much money will be in her bank account in six months?

Solve: 25 points find the fifth term of an increasing geometric progression if the first term is equal to 7−3 √5 and each term (starting with the second) is equal to the difference of the term following it and the term preceding it.