How can you find a unit rate when given a rate?

What number should be added to both sides of the equation to complete this square? x^2-10x=7

Question part points submissions used suppose that 100 lottery tickets are given out in sequence to the first 100 guests to arrive at a party. of these 100 tickets, only 12 are winning tickets. the generalized pigeonhole principle guarantees that there must be a streak of at least l losing tickets in a row. find l.

The total number of dental clinics total for the last 12 months was recorded