We need to compute the slope of the graph shown
m = (y2 - y1)/(x2 - x1)
m = (25-10)/(5-2)
m = 15/3
m = 5
The slope of 5 means the graph tells us "she is walking 5 feet per second".
So the first part of her walk is at 4 feet per second, then the second part of her walk is at 5 feet per second. The second part of her walk is faster. As a story scenario, perhaps she realizes she is going to be late getting home which is why she is walking a bit faster now.
36v - 12 = 12 .....add 12 to both sides
36v - 12 + 12 = 12 + 12...simplify
36v = 24...divide both sides by 36
(36/36)v = 24/36
v = 2/3 <===
The average is found by adding all the temperatures together, then dividing by the number of days.
Since the average for five days was 63, then the total of the temperatures need to equal 63 x 5 = 315.
The total for the first four days was : 56 + 60 + 79 + 70 = 265
The fifth day is 315 - 265 = 50 degrees.
I hope its clear that answer to the first part
