X² + x - 20 = 0
x² = x * x
x = the sum of the factors of -20
-20 ⇒ 1 x 20
2 x 10
- 4 x 5 ⇒ only these factors can arrive to a sum of 1
(x - 4)(x + 5) = x(x+5) - 4(x+5) = x² + 5x - 4x - 20 = x² + x - 20
x - 4 = 0
x = 4
x + 5 = 0
x = -5
Answer:
The perimeter of a rectangle is:
Step-by-step explanation:
Given
The width of a rectangle w = 8n - 8.5 feet
The length of a rectangle l = 8.5n + 10 feet
To determine
The perimeter of a rectangle = P = ?
The perimeter of a rectangle can be determined using the formula

substitute l = 8.5n + 10 and w = 8n - 8.5




Therefore, the perimeter of a rectangle is:
Answer:
it don't make sence where is the table
Step-by-step explanation:
55 divided by 6 = 9.16666667 or do you want the shortened version??