does he have?
I've been stuck on this question for 20 min. This is what I got
x+5(10)+x(5) = 235
2X + 15 = 235 but when I solve it it is not correct, I've tried every combanation that I can think of.
2007-01-15 11:33:40 · 6 answers · asked by Nelly 1 in Science & Mathematics ➔ Mathematics
5x + 10y = 235 where x is the number of nickels, y is dimes...
and x + y = 32
solve one of them for x or y.. substitute that value into the other and solve.
2007-01-15 11:41:01 · answer #1 · answered by ♥Tom♥ 6 · 0⤊ 0⤋
let x = the number of nickles
let y = the number of dimes
x + y = 32
5x + 10y = 235
from the first equation, you know that x = 32 - y
so substitute it for x in the second equation:
5 (32 - y) + 10y = 235
160 - 5y + 10y = 235
160 + 5y = 235
5y = 235 - 160
5y = 75
y = 15
Since you now know that y is 15, you can put it back into the first equation:
x + y = 32
x + 15 = 32
x = 32 - 15
x = 17
To check the answer - 17 nickels plus 15 dimes should equal 2.35 - 17 nickles is 85 cents, and 15 dimes is $1.50 - together they do indeed equal $2.35
2007-01-15 11:45:34 · answer #2 · answered by Anonymous · 0⤊ 0⤋
5n+10d=235
n+d=32 multiply by -5
-5n-5d=-160
5n+10d=235 add
5d=75
d=15
n+15=32
n=17
17 nickles & 15 dimes
check
5*17+10*15=85+150=235
2007-01-15 11:39:06 · answer #3 · answered by yupchagee 7 · 0⤊ 0⤋
your answer should be 17 dimes and 15 nickels and i think ur equasion or however you spell it is wrong it should be (D*.1)+(N*.05)=2.35
i made a list to help me until i got 32 for the number and 2.35 Good luck
2007-01-15 11:45:06 · answer #4 · answered by shorty_rdb 2 · 0⤊ 0⤋
17 nickles and 15 dimes your welcome haha..
ok in algebra you put this like this .5x+.10(32-x)=2.35 then solve for x in the equation
2007-01-15 11:38:57 · answer #5 · answered by blazncaczn 3 · 0⤊ 0⤋
DO YOUR OWN HOMEWORK
2007-01-15 11:37:46 · answer #6 · answered by piggylover_850 4 · 0⤊ 0⤋