What two negative numbers have a product of 16 and a sum of -17

Ineed asap. i cant understand this question i need someone to me right away

Atheater wants to build movable steps that they can use to go on and off the stage. they want the steps to have enough space inside so they can also be used to store props. how much space is inside the steps?

The holiday party will cost $160 if 8 people attend. if there are 40 people who attend the party, how much will the holiday party cost