Answer:
what to do here I don't know sorry
...............
.
........
x=20°
2.
x=27°
Step-by-step explanation:
sin(x+20)=cos (2x+10)
=sin (90-(2x+10))
so x+20=90-(2x+10)
x+20+2x+10=90
3x=90-30
3x=60
x=60/3=20
2x+14+x-5=90
3x+9=90
3x=90-9=81
x=81/3=27
Runner B is going slower.
