Answer:
26
Step-by-step explanation:
9+4+9+4=26
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:
9
Step-by-step explanation:
f(3) means what is the value of f(x) when x = 3
From the table
When x = 3 then f(x) = 9
Thus f(3) = 9
Answer:
No
Step-by-step explanation:
A triganles angles can only equal 180º
150º + 20º + 20º = 190º
190º > 180º