Answer:
i think 9 since all the trianles r the same
Step-by-step explanation:
when given two points, you can find the slope of the line that passes through those points by using the slope formula
7. A(1,3), B(4,7)
(the ordered pair you choose to use for x1,y1 could be the other ordered pair, it doesn't really matter)
plug in
8. C(3,5), D(-2,6)
plug in
9. E(-4,0), F(5,5)
plug in
10. K(-4,4), L(-5,4)
plug in
Sum of 1st cube no N th triangle no