:( need a real mathematics wizz to me.

Chip worked at the animal shelter for 6 hours each week for several weeks. he worked for a total of 42 hours. which of the following can be used to find the number of weeks chip worked at the animal shelter?

The multiplication property of zero states that the product of any number and 0 is 0. what must be true about either a or b to make ab=0

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