Let a, b, c represent the numbers of subscribers who watched 1, 2, and 3 videos, respectively.
.. a +b +c = 312 . . . . . . . there are 312 subscribers, total
.. a +2b +3c = 740 . . . . there were 740 total views
Subtract double the first equation from the second.
.. (a +2b +3c) -2(a +b +c) = (740) -2(312)
.. c -a = 740 -624 = 116
116 more people watched all three videos than watched one video.
What is the area of the triangular base?
8 square feet
What is the length of edge DF?
4 feet
X = measure of 1st angle
y = measure of 2nd angle
x + y = 180
y = 3(x+25)
Therefore,
x + 3(x+25) = 180
x + 3x +75 = 180
4x = 105
x = 26.25
So the measure of the 1st angle is 26.25 and the 2nd is 153.75
