It’s right I don’t see what’s wrong with it ok? So go ahead
Least common multiple of 5 and 6.
5: 5, 10 , 15 , 20 , 25 , 30
6: 6, 12 ,18, 24, 30
30 is the least common multiple of 5 and 6.
ANSWER
The value of theta in the second quadrant is,

EXPLANATION
The given trigonometric equation is

This implies that,

This implies that the principal solution is

and it is an angle in the first quadrant.
But the solution we are looking for is an angle in the second quadrant.
This is given by
The answer is B.red
the reason:
if x=2
-2 (2)+ 5y = 10
-4 +5y = 10
5y = 10+4
5y = 14
y = 2.8
now we have the point (2 . 2.8) which is absolutely on the line -2x + 5y = 10
when we look for it we see that it's on the line b which means line b is -2x + 5y = 10