Please help thank you

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

Erinn wrote the equation –5x + 4y = 32 to represent her hourly wage (y) and how this wage has changed during each year that she worked at a company (x). what is the rate of change in erinn's hourly wage per year?

Which statements are true about additional information for proving that the triangles are congruent check all that apply