1 y=-2x + 9
y = x + 7
a
1
Lines y = -2x + 9 and y = x + 7 intersect the x-axis.
b
1
Lines y = - 2 x + 9 and y = x + 7 intersect the y-axis.
С
1
Line y = - 2x + 9 intersects the origin.
d
1
Line y = - 2x + 9 intersects line y = x + 7.

80 degrees

Step-by-step explanation:

Hi there!

The angle that measures 100 degrees and angle 8 are supplementary, meaning they add up to 180 degrees.

180 - 100 = Angle 8

Angle 8 = 80 degrees

Therefore, angle 8 measures 80 degrees.

Now, angle 4 and angle 8 are corresponding angles. This makes them equal.

Therefore, angle 4 is 80 degrees.

I hope this helps!