Just subsitute 8 for n
1/2(8)^2-1/2(8)
1/2(64)-4
32-4
28
D
Answer:
6+2-3
Becuz u immediately can do the problem with lower numbers which makes it easier than adding big numbers like 8+36
Theoretical Probability is what you think the result will be, and experimental probability is what it turns out to be, hope this helps.
I hope this helps you
slope=m
(-3,4) x'=-3 y'=4
(4,-1) x"=4 y"=-1
slope formula :
m. (x'-x")=y'-y"
m. (-3-4)=4-(-1)
m.-7=4+1
m=-5/7
Evaluation of square root 169 = 13, so 10 + 13 = 23
