Answer:
(x, y)=(3/4, 3)
Step-by-step explanation:
D) Undefined
x=7
6x-7 and 4x+7 are vertical angles and are thus equal. Then 6x-7 = 4x+7, or 2x = 14.
x = 7.
Answer: d1 is 50, c2 is 21/25