Answer:
5yards
Explanation:
Area of the parallelogram = Base * Height
Given
Area = (5x+20)yd²
Base = (x+4)yd
Required
height
Substitute into the formula
5x+20 = x+4 * Height
Height = 5x+20/x+4
Height = 5(x+4)/x+4
X+4 cancels out to have;
Height = 5
Hence the height of the parallelogram is 5yards