90% in a fraction is the same as 90/100 simplified, is 9/10.
Hope this helps
I think you have to choose any numbers in the graph to solve for Rafael and Ava
first term = initial number
second term = initial number + common difference
third term = initial number + 2(common difference)
So...
2x+5-(x+4) = common difference
4x+3-(2x+5) = also common difference
2x+5-(x+4) = x+1
4x+3-(2x+5) = 2x-2
Because x+1=2x-2 we can solve for x.
x=3
So the sequence goes... 7,11,15...
19 is the fourth term
They add up to 180 degrees
It is called the median :)
