Answer:
B. X squared is -3 times -3, which is equal to 9.
Step-by-step explanation:
sin(theta) + cos(theta) = 0
sin(theta) = -cos(theta)
sin(theta)/cos(theta) = -1
tan(theta) = -1
theta = - 45° ± k·180°
I believe your answer would be C
81
27 total of pupils.
girls 1×27=27
boys 2×27=54
total 54+27=81
