Answer:
cos -60° =
,
cos 660° = 
Step-by-step explanation:
hope it helps
Answer:
B. 0.20 per century
Step-by-step explanation:
I calculated it logically
Answer:
5
Step-by-step explanation:
√
(
−
3
−
9
)
2
+
(
5
−
−
4
)
2
=
√
(
−
12
)
2
+
9
2
=
√
144
+
81
=
√
225
= 15
Distance between points (9, -4) and (-3, 5) is 15