Which of the following best represents a linear proportional relationship?

The equation x2 – 1x – 90 = 0 has solutions {a, b}. what is a + b?

Acompany manufactures three types of cabinets. it makes 110 cabinets each week. in the first week, the sum of the number of type-1 cabinets and twice the number of type-2 cabinets produced was 10 more than the number of type-3 cabinets produced. the next week, the number of type-1 cabinets produced was three times more than in the first week, no type-2 cabinets were produced, and the number of type-3 cabinets produced was the same as in the previous week.

Afamily went out to dinner and their bill was $113.if they want to leave a 19% tip, how much should they leave.