2 because there are 4 numbers of edges and 4 vertices
Answer:
4
5(2)+5(7)
Step-by-step explanation:
One would be 240 + 360 = 600 degrees
and negative = 240-360 = -120 degrees
Answer:
d= -2
Step-by-step explanation:
7 + 4d + 5d = 7d + 3
Combine like terms
7+9d = 7d+3
Subtract 7d from each side
7+9d-7d = 7d-7d+3
2d +7 = 3
Subtract 7 from each side
2d+7-7 = 3-7
2d = -4
Divide each side by 2
2d/2 = -4/2
d = -2
