Okay this is how I would figure this out:
I would take 9 divided by 3 and get 3, so he can tile abut 3 square ft. in 15 minutes.
Then, I would multiply 3 by 4 because there are 4 15 in an hour. I would get 12.
So it takes Jakob 1 hour to tile 12 square feet.
Your answer is: He can tile about 12 square feet per hour.
Hope this helped :)
It's 21.125 hope this works good luck ;)
Each book costs $15. 90 divided by 6 is 15 which is also 90 over 6.
3t=7+5=12
3t=12
t=4
6t=6×4=24
The answer is 24
