Why am i still in the helping hand rank im confused why

Me! 50 points! why does when we come home, our door is unlocked and there is grease on the door knob, me solve this , and i don't know what category this goes under

Issof claims that the scale factor is 1/2. which statement about his claim is correct

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