Answer:
10[tex]x^{2}[/tex] -20x -12.5 inches
Step-by-step explanation:
Triangle Area Equation:
Area of triangle = [tex]\frac{1}{2} * base * height[/tex]
base = 10x + 5
height = 2x - 5
1/2 (10x + 5) (2x - 5)
= 1/2 (20[tex]x^{2}[/tex] - 50x + 10x - 25)
= 1/2 ( (20[tex]x^{2}[/tex] - 40x - 25)
= 10[tex]x^{2}[/tex] -20x -12.5 inches
