My mind goes blank at word problems: Mark and Nancy are making punch for a party and are using two types of juice: pineapple and papaya. The total number of quarts must be more than 9 but less than 15. They should use at least 4 quarts of each type. We want to find out how many quarts of each juice they should buy.
Pick one of the ordered pair solution from your answer in #2 and explain what each number represents

Question

jdoe0001 · Answer

we know that, whatever amount your pour of one, the other will have to be at least 4 quarts
we also know that the amount of both, have to be more than 9 quarts
so, if we pour 5 of papaya, the amount of pineapple will be 
(10-papaya) + 4
or (10 -5 ) +4
5+4 = 9 quarts of pineapple
why +4? because each quantity should be at least 4 quarts
so 
pineapple   = a
papaya        = (10-a+4)

  9 < a + (10-a+4) < 15

jdoe0001 · Answer

that should cover it, I'd think, since "a" cannot be 11, because 11 + 4 will make it 15 and it has to be < 15

anonymous · Answer

thank you, you get the medal!

jdoe0001 · Answer

yw