2x-y+4z =9 3x - 2y - 5z=-13 X+y-7z=0 Solve using elimination, show steps please!!!!
1 answer:
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Answer: 72°, 108°, 108°
<u>Step-by-step explanation:</u>
Vertical angles are congruent (equal) so if one angle is 72° then its vertical angle is also 72°.
A vertical angle and its adjacent angle form a 180° angle, so the other two angles are each 180° - 72° = 108°
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