Can someone please answer B :)

The product of two negative rational numbers is always zero sometimes zero never zero

Another type of subtraction equation is 16-b=7. explain how you would sole this equation then solve it.

Mr. vector door is buying two new cowboy hats all together the hats cost $75.12 the second heart cost twice as much as the first hat what is the price of the more expensive at round to the nearest hundredth