An architect is trying to find the perfect place to build a "A" shaped bridge over a river. The left side of the bridge begins at (-9,-4) and the right side of the bridge is at (9,-4).
The top of the "A" shaped bridge will be located at (0,2). Sea-level (ground level) is when y = -4.

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.