Answer:
53°
Step-by-step explanation:
17² = 18² + 20² - 2(18)(20) cos Q
289 = 324 + 400 - 720 cos Q
289 = 724 - 720 cos Q
-435 = -720 cos Q
0.6042 = cos Q

Q = 52.83
Answer:
52,53,54
Step-by-step explanation:
x, x+1, x+2
2x+1=x+53
x+1=53
x=52
x+1=53
x+2=54
I think it is 10 lol sorry I’m not sure
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