Answer:
sn = d/2·n^2 + (a - d/2)·n
sn = (-4)/2·n^2 + (19 - (-4)/2)·n = -441
- 2·n^2 + 21·n = -441
- 2·n^2 + 21·n + 441 = 0
n^2 - 21/2·n - 441/2 = 0
use pq-Formula
n = -10.5 ∨ n = 21
only n = 21 makes sense. So n = 21 is the correct answer.
Answer:
The correct answer is A)
PRISM.
Explanation:
Any 2-dimensional shape formed with straight lines is a polygon. Examples of polygons are:
- Quadrilaterals
- Hexagons
- Pentagons, and
- Triangles are all examples of polygons. The name of polygons are usually indicative of the number of sides they have.
Cheers!
Answer:0.416666667
Step-by-step explanation:trust me bro
Answer:
Step-by-step explanation:
(32 x 32) = 32^2