The answer to this question is 87
Y = ln |1 + t - t^3| = (1 - 3t^2)/(1 + t - t^3)
Hack: we know that 25%=1/4
1/4 of 5000=5000/4=1250
answer is $1250
but the right way is
25%=25/100=1/4 then the math bit then answer is $1250

Angles forming linear pair are :

And we know, they are supplymentary
So, the measures of the given angles are :
And
_____________________________
