What is the sum of an 8-term geometric series if the first term is -11, the last term is 180, 224, and the common ratio is -4

The sum is

Step-by-step explanation:

we know that

The formula of the sum in a geometric sequence is equal to

where

a1 is the first term

r is the common ratio

n is the number of terms

we have

a1=-11

r=-4

n=8

substitute the values

step-by-step explanation: h: (- 3, 6)

m: (1, - 2)

o: (7, 6)

r: (- 9, - 2)

midpoint of hm: (- 1, 2)

midpoint of or: (- 1, 2)

therefore, b is the midpoint of both diagonals bisect each other !

to prove the diagonals are perpendicular, show that the product of the slopes = - 1

answer: check all that apply, where the options?

step-by-step explanation: