How many cups of 15% juice must be added to 10 cups of
20% juice so that the mixture is
17% juice?

Step-by-step explanation:

20% of juice has:

If x cups of juice added we'll have:

$650 per month plus utilities

step-by-step explanation:

just based on the info you gave, it would seem more cost effective to rent at $650 per month plus utilities.   if utilities are, in fact, $150 per month, your monthly living costs would be $800 as opposed to the other option of $825.