In the smallest of the three triangles (with sides
) we have

In the second-largest triangle (with sides
), the length of the missing side is
. Then in the largest triangle (with sides
), we have



Equivalently, we have

In turn, we find

<u>Given:</u>
A triangle with a base length of 22 ft and a height of 20 ft.
<u>To find:</u>
The area of the given triangle.
<u>Solution:</u>
The area of a triangle is obtained by multiplying
with its base length and its height.
The area of a triangle 
The height is the distance from the base to the highest point on the triangle and the length of the base is the base length.
The given triangle has a base length of 22 ft and a height of 20 ft.
The area of the triangle 
ft².
The given triangle has an area of 220 ft².
Answer: No solution
Step-by-step explanation:
Answer:D
Step-by-step explanation:
(3x^3 - 5x^2 + 4x - 9)-(7x^3 - 8x^2 - 5x + 10)
open brackets
3x^3 - 5x^2 + 4x - 9 - 7x^3 + 8x^2 +5x - 10
Collect like terms
3x^3-7x^3-5x^2+8x^2+4x+5x-9-10
-4x^3+3x^2+9x-19