Answer:
1. 12 units
2. 8.9 units
3. 10
--------------------------------------------------------------------------------------------------------------
steps
1.√
(
−
3
−
9
)
^2
+
(
5
−
5
)
^2
√
(
−
12
)
^2
+
0
√
144
√
144
≈
12
************************************************
2. √
(
7
−
(−
1)
)
^2
+
(
10
−
6
)
^2
√
(
7
+
1
)^
2
+
(
10
−
6
)
^2
√
(
8
)^
2
+
(
4
)
^2
√
64
+
16
√
80
≈
8.94427190999916
round up to 8.9
*****************************************************
3.
√
(
6
−
0
)
^2
+
(
0
−
8
)
^2
√
(
6
)
^2
+
(
−
8
)
^2
√
36
+
64
√
100
≈
10
