Question 1009499
Let 1/n be the amount of work Antonio can do in one hour. Then:
1/n+1/(n+4)=1/8
8/n+8/(n+4)=1
8(n+4)+8n=n²+4n
n²-12n-32=0
Using the quadratic formula, we get n=14.246 hrs, and n+4=18.246 hrs. &#9786;&#9786;&#9786;&#9786;