Answer:

Step-by-step explanation:

<h3>so the dividend and divisor were both multiplied by 100.</h3>
Joe completes an average of (10 ft)/(5 h) = 2 ft/hour. Bill completes an average of (10 ft)/(4 h) = 2.5 ft/hour. Together, they complete 2+2.5 = 4.5 ft/hour. At that rate, it will take them
... (120 ft)/(4.5 ft/h) = 26 2/3 h
The awnser is (-1+3/x-3/x2+1/x3 )