1. 5x+9-4x=17
2. x+10-7x=-44
3. 10+5x+6x=98
4. x+2-7x=-34
5. -2x-6+x=6
6. 1=x-5x+9
7. 35=-4x+7x-1
8.10+3x-7x=10
9.-3+x+3x=41
10.5-5x-3x=-51
11. 4x+8-x=8
12. 3=6x-4x-9
13. -6x+2+x=17
2007-10-01 10:50:13 · 2 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
ok so this whole you should know this stuff crap isn't answers ok...i know how to do this i just have to much junk to do so please give me an answer not a freggin lecture thanks
2007-10-01 10:59:21 · update #1
These are so simple you should not be asking for help. Please study a bit and listen in class.
2007-10-01 10:54:16 · answer #1 · answered by ironduke8159 7 · 1⤊ 0⤋
Grams of 20%-retinol hand cream (x): 0.2x + 0.05(60 - x) = 0.1(60) 0.2x + 3 - 0.05x = 6 0.15x = 3 x = 20 Answer: 20 grams of 20%-retinol hand cream was used. Proof (result is a 10% retinol compound): = 100%([0.2{20 gm} + 0.05{60 - 20 gm}]/60 gm) = 100%([4 gm + 0.05{40 gm}]/60 gm) = 100%([4 gm + 2 gm]/60 gm) = 100%(6 gm/60 gm) = 100%(0.1) = 10%
2016-05-18 04:35:38 · answer #2 · answered by Anonymous · 0⤊ 0⤋