Answer:
58 degrees or [30, 88]
Step-by-step explanation:
In such a context, the word "range" can have different meanings. On the one hand it is the difference between high and low:
88 -30 = 58 . . . . range of temperatures
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On the other hand, it is the interval between (and including) the high and low:
[30, 88] . . . . temperature range
The coordinates of A = (2,9)
The coordinates of B = (7,4)
Let M (x,y) be the mid point of A and B.
So, the coordinates of mid point of A and B is .
129 :)
1/2-1/3
(1/2)x3-(1/3)x2
3/6-2/6
1/6