15.01:
1) 3x-9/x-3
2) 5x-30/5x+25
3) 3x-21/3x+27
4) 4x/-5x+x^2
5) x+6/x^2+11x+30
6) x^2+4x-21/x-3
7) x^2+x-20/x^2+3x-28
8) x^2+7x+10/x^2-2x-8

1) 3(x-3)/(x-3) = 3/1=3
2) 5(x-6)/5(x+5) = (x-6)/(x+5)
3) 3(x-7)/3(x+9) = (x-7)/(x+9)
4) x(4)/x(x-5)=4/(x-5)
5) (x+6)/(x+6)(x+5)=1/(x+5)
6) (x-3)(x+7)/(x-3)=(x+7)/1=x+7
7) (x+5)(x-4)/(x+7)(x-4)=(x+5)/(x+7)
8) (x+5)(x+2)/(x+2)(x-4)=(x+5)/(x-4)

Definitely

Ican’t sorry i would if i could