Answer:
Step-by-step explanation:
The first three surveys have similar results but the last one is significantly different from the others.
It indicates twice as greater number towards English and almost twice as smaller numbers against the Math and Science.
This is likely biased survey.
Sinα=3/10
α=arcsin(3/10)°
α≈17.5°
But since we are restricted to 90°<α<180° the angle must lie in the second quadrant so:
α≈(180-17.5)°
α≈162.5°
Answer: 2
(-4,1)(1,-2)
M=-2+4/1-1
=2/0
=2
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4x+8y=40
0.8*8=6.4
4x+6.4=40
40-6.4=33.6
4x=33.6
33.6\4=8.4
X=8.4