Answer:
a. 5
Step-by-step explanation:
arrange
1 2 3 5 5 6 6 6 8 9 9 10 10 11 12 13
median=6+8/2=7
range=13-1=12
difference=12-7=5
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70 is the answer for this question
3x + 6y = 36
+ 3x - 6y =0
------------------------
6x = 36
x = 36/6
x = 6
3(6) - 6y = 0
18 - 6y = 0
-6y = -18
y = 3
a and b
