A grocer mixes two kinds of nuts. One kind costs $5.00/kg and the other costs $5.80/kg. How many kilograms of each type are needed to make 40 kg of a blend worth $5.50/kg?
2007-01-26 10:07:08 · 4 answers · asked by mike 1 in Science & Mathematics ➔ Mathematics
well I'm asking for help on here because I am homeschooled and my teachers e-mail isn't up at the moment
2007-01-26 10:17:46 · update #1
x = # of 1st
y= # of 2nd
x + y = 40 kg
5x + 5.8y =40*5.5 = 220
x = 40-y
5(40-y) + 5.8y = 220
200-5y + 5.8y = 220
.8y = 20
y = 25
x = 15
2007-01-26 10:19:14 · answer #1 · answered by Bill F 6 · 0⤊ 0⤋
the answer is ninety% acid so if S is the quantity of answer then S = .a million S + .9 S the place .1S is the quantity of water and .9 S is the Acid we upload D gallons of distilled water to make ninety entire gallons D + S = ninety the entire Water, W = D + .a million S and the entire acid is .9S provided that's a 50% answer W = 50% of ninety = 40 5 A = 50% of ninety = 40 5 A = .9S = 40 5 S = 40 5/.9 = 50 gal. of the acid answer is used and 40 gal of distilled water.
2016-11-01 09:10:59 · answer #2 · answered by gennusa 4 · 0⤊ 0⤋
You really need to do your own homework.
If you are having trouble, ask the teacher for extra help or to get you a tutor. Many times, teachers will give you the benefit of the doubt on things when you show them that you are trying.
2007-01-26 10:15:49 · answer #3 · answered by Jenny 2 · 0⤊ 0⤋
$5x + $5.8y = $5.5(40)
x+y=40
x=40-y
y=40-x
5(40-y) + 5.8y = 220 = 5.5*40
200-5y+5.8y=220
.8y=20
y=20/.8
y = 25
since x+y =40 and we see y=25 , x = 15
test result:
(25(5.8) + 15(5) ) / 40 = ?
5.5
Thank me very much
2007-01-26 10:28:42 · answer #4 · answered by callmethefixer 1 · 0⤊ 0⤋