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aallyssabrown0120
16.07.2019 •
Mathematics
The coffee counter charges $8 per pound for kenyan french roast and $12 per pound for sumatran coffee. how much of each type should be used to make a 26 pound blend that sells for $10 per pound ?
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Ответ:
Cost of Kenyan coffee is ($8/lb)k, and cost of Sumat. coff. is ($12/lb)s
($8/lb)k + ($12/lb)s must = ($10/lb)(26 lb)
Then 8k + 12s = 260, and k=26-s.
Substituting, 8(26-s) + 12s = 260. 208 - 8s + 12s = 260. This boils down to 4s = 52, and so s = 13 (lb). Then k = 26-13 = 13 lb.
Check: ($8/lb)(13 lb) + ($12/lb)(13 lb) must add up to ($10/lb)(26 lb. Do they?
Ответ:
it is 7.5
Step-by-step explanation: