Answer:
x=111
Step-by-step explanation:
the supplementary angle is 16. triangles should add up to 180.
Well im not sure about that but I think the answer is 42.5
2x²(3x - 4)(x + 5)
= 2x²(3x² + 15x - 4x - 20)
= 2x²(3x² + 11x - 20)
= 6x⁴ + 22x³ - 40x² (Answer D)