Elliot is riding in a 100 mile bike race to raised money for a charity. so far he has completed 7/10 of the race. how far has elliot biked

Can any one me with the answers to these questions asap?

Which is f(5) for the function –2x2 + 2x - 3?

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