You need to find the total distance and the total time. The total distance is two times the distance to school, 2d.s=d/t=>t=d/sWhere s is speed, d is distance and t is time. So the time taken to get to school is:d/s1and the time taken to get back is:d/s2so the total time is:d/s1+d/s2=d(1/s1+1/s2)So, as speed = distance/time, divide the total distance by the total time:2d/d(1/s1+1/s2)=2/(1/s1+1/s2)=2/(1/20+1/40)=80/3≈26.7km/hr
It equals to 65 for the exact answer
Answer:
The answer is ">"
Step-by-step explanation:
I took the quiz epicly
Step-by-step explanation:
in the quadratic equation 3x²+7x-4=0, which is the constant term?
The answer is false. They do not require them to contribute. (:
