Answer:
1st is valid 2nd is not valid
Step-by-step explanation:
<h3>
Answers:</h3><h3>
x = 12</h3><h3>
Angle B = 45 degrees</h3>
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Explanation:
Angles A and B are alternate exterior angles.
Due to the parallel lines, alternate exterior angles are congruent
A = B
5x-15 = 2x+21
5x-2x = 21+15
3x = 36
x = 36/3
x = 12
Use this x value to find the measure of angle B
angle B = 2x+21
angle B = 2*12+21
angle B = 24+21
angle B = 45 degrees
As a check,
angle A = 5x-15
angle A = 5*12+15
angle A = 60-15
angle A = 45 degrees
Since A and B are both 45 degrees, this confirms the correct x value
Answer:
i dont really know to be honest
9-1a/2 = 5+4a
-5 -5
4-1a/2 = 4a
+1a/2 +1a/2
4 = 9a/2
*2 *2
8 = 9a
/9 /9
8/9 = a
HOPE THIS HELPS!!!
