Compute the slope of the line through (-2, -9) and (-4, -17):

Any line perpendicular to this line will have slope -1/4. The one that passes through (0, 10) satisifes

If 200/8=25 per hour, then i divided that by 2 to get 12.5 for 30 minutes.
x² - 20x + 91
x -13
x -7
your answer is (x - 13) (x - 7)
hope this helps
The formula for the triangular sequence is Xn=n(n+1)/2
So X25=25(25+1)/2=325
15/2 if you are binging it to simplest form