13x - y = 3 .....(1)
x - 6y = -33 ......(2)
eqn (2) × 13
13x - 78y = -429 .....(3)
(3) - (1)
13x - 78y = -429
13x - y = 3
(-). (+). (-)
_________________
- 77y = 431
_________________
-77y = 431
y = 431 ÷ -77
y = -5.5
Answer:
92
Step-by-step explanation:
Corner triangle: 1/2 (2 x 2) = 2
4 triangles = 4 x 2 = 8
Octagon + 4 triangles forms a square: 10 x 10 = 100
Octagon: 100 - 8 = 92
Answer:
=2
Step-by-step explanation:
Answer
Step-by-step explanation:
