Answer:
1. -30
2. undefined
3. x intercept = 5/4 (5/4, 0)
y intercept = 5 (0, 5)
4. x intercept = 4/5 (4/5, 0)
y intercept = 4 (0, 4)
5. y = 4
6. undefined
Explanation:
1. 12+18/11-12
30/-1 = -30
2. -15 + 20/-18 + 18
5/0 = undefined
3. 4x + y = 5
0 + y = 5
y = 5
4x + 0 = 5
x = 5/4
4. y = 0 - 4
y = 4
0 = 5x - 4
4 = 5x
4/5 = x
5. y = mx + b
4 = 0(3) + b
4 = b
y = 0x + 4
y = 4
6. If a line is drawn through 1 it will be undefined