Answer: 150 - x^2 - 5x degrees.
Explanation:
x^2 + 30 (for the obtuse angle) + 5x (for the acute angle) + angle BCA = 180
To find the measure of angle BCA, we'll rearrange the equation:
angle BCA = 180 - (x^2 + 30 + 5x)
angle BCA = 180 - x^2 - 5x - 30
angle BCA = 150 - x^2 - 5x
So, the measure of angle BCA is 150 - x^2 - 5x degrees.