Help me please due in 8 minutes1

In a two-digit number the units' digit is 7 more than the tens' digit. the number with digits reversed is three times as large as the sum of the original number and the two digits. find the number.

Suppose that 15 inches of wire cost 60 cents. at the same rate, how much (in cents) will 12 inches of wire cost

Petes dog weighed 30 pounds it then lost 16% of it's weight how much did pete lose