114, 11. Jika {(x, y)} merupakan himpunan penyelesaian dari
persamaan linear x - y = -3 dan 5x + 4y = 30 maka nilai
+ y adalah

(10 points) 1. cone 2. rectangle 3. triangle 4. circle 5. cylinder a. perpendicular cross section of a pyramid b. perpendicular cross section of a cylinder c. parallel cross section of a sphere d. shape created when a rectangle is rotated about the y-axis e. shape created when a right triangle is rotated about the y-axis