Z=4t-5
z+t=180
z= 180-t
4t,-5=180-t
5t=185
t=37
180-37=z = 143
The median is the value that is in the middle of a dataset.
The first step to find the median is to order the values from least to greatest:
7, 8, 11, 12, 13, 15.
Since the number of data is even, the median will be the average of the pair of values that is in the middle, in this case, 11 and 12:

The median of the data set is 11.5.
Kelly .7 > Mary .49
Because kelly is actually .70 away from school when Mary is .49.
So Kelly would be farther away from school then Mary.
Hopefully this photo helps
52+6×2− 2
10
2 Simplify
6
×
2
6×2 to
12
12.
52
+
12
−
10
2
52+12−
2
10
3 Simplify
10
2
2
10
to
5
5.
52
+
12
−
5
52+12−5
4 Simplify
52
+
12
52+12 to
64
64.
64
−
5
64−5
5 Simplify.
59
59