Need help .please help mee.. (dont answer if u dont know how to do it).

To prove p is equal to q using an indirect proof what would your starting assumption be?

Jonathan can type 20 documents in 40 minutes ,and susan can type it in 30 minutes and jack can type it in 24 minutes working together ,how much time will it is take them type the same document

Ab and bc are tangent to circle d. find x is ab = 3x + 8 and bc = 26. find x