The answer sets are
{-2, 7}--> a2 − 5a − 14 = 0
{2, -7}--> a2 + 5a − 14 = 0
{-2, -7}--> a2 + 9a + 14 = 0
{7, 2}--> a2 − 9a + 14 = 0
Answer:
1st angle = X
2nd angle = X + 7
3rd angle = X + 18
Then (sum. them): 3X + 25 = 180 ==> X = 51.67 degree
Therefore,
1st angle = 51.67 degree
2nd angle = 58.67 degree
3rd angle = 69.67 degree
.12g of Na
Step-by-step explanation:
6 and 7
10(13-X) + X= 13-9X. 3×2=6. 7-6=1. 7+6=13
