The chef will be able to prepare 3 servings of pasta because if you take one away from a whole number you have 9/10ths so you do that process again you have 2 servings but, you have 2 tenths left over so you add that to the 7 tenths.
Hope this helps :)
Answer:
If it's not too late by now, the answer is 19.9 
In fraction is 3/4 and 3/4
Decimal is .75 and .75
If x is how long your friend swims and y is how long you swim, the answer would be x + 15 = y
bearing in mind that the slope goes by several names
average rate of change
rate of change
rise over run
deltaY over deltaX
however, is the same cat disguised with a different costume.
