Answer:
I knwo you Ur Gae
Step-by-step explanation:
Hi I just need points if you mark me brain least I will sulfur for you
Since complementary angles add to 90°, (4x - 1) and (5x + 19), also add to 90°.
Thus, lets form an equation:
90 = 5x + 19 + 4x - 1
72 = 9x
x = 9
Thus, the measure of angle B is 64°.