how much gold valued at $12 per gram must be mixed with silver valued at $.80 per gram to obtain 20g of an alloy worth $5 per gram?
2007-02-05 08:23:05 · 14 answers · asked by camijo17 3 in Science & Mathematics ➔ Mathematics
7.5 grams gold
12.5 grams silver
12(7.5) + 0.80(12.5) = $100.00
7.5+12.5 = 20 grams
100/20 = 5 dollars/gram
2007-02-05 08:29:48 · answer #1 · answered by gman1602 3 · 1⤊ 0⤋
8 grams
2007-02-05 16:25:06 · answer #2 · answered by scotgal 4 · 0⤊ 0⤋
12 grams
2007-02-05 16:27:04 · answer #3 · answered by Cashese 2 · 0⤊ 1⤋
7.5 Gm of Gold and 12.5 Gm of Silver should do the trick assuming you can create such an alloy.
2007-02-05 16:35:45 · answer #4 · answered by Jim O 2 · 0⤊ 0⤋
5 grams??
2007-02-05 16:25:21 · answer #5 · answered by ? 4 · 0⤊ 0⤋
5gr gold 50 gr silver
2007-02-05 16:28:47 · answer #6 · answered by shadi_pop 2 · 0⤊ 0⤋
Have know idea, but will shoot for 10. However, I know I will get 2 points.
2007-02-05 16:30:17 · answer #7 · answered by beachprincesssc 2 · 0⤊ 0⤋
I'm not doing math today. I'll settle for 2 points.
2007-02-05 16:25:21 · answer #8 · answered by zil28ennov 6 · 0⤊ 0⤋
12x + .8y = 20*5
x = 5
y = 50
2007-02-05 16:26:07 · answer #9 · answered by Anonymous · 0⤊ 0⤋
12x + .8y = 20*5
you do the math
2007-02-05 16:27:28 · answer #10 · answered by Anonymous · 0⤊ 0⤋