Answer: HK
Step-by-step explanation:
Answer:
-2
Step-by-step explanation:
3x isnt used because it stated when x>1.
so -2(1) is -2, because x =< 1 is true
1. v=d/t=7.5/1.5=5 km/h
2. v=d/t=(v1*t1+v2*t2+v3*t3)/(v1+v2+v3)=(15*10+20*10+25*5)/(10+10+5)=
=(150+200+125)/25=475/25=19 m/s