38 - 8 - 7n < 3n
2007-01-10 13:12:50 · 15 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
I keep getting this 30 < 10n
i keep getting this wierd answer!!! am i dividing wrong???? i think i am!!!
and i divinde by 30 on each side and isnt the 30 supposed ot go into the 10 instead of the 10 going into the 30?!?!?
2007-01-10 13:21:19 · update #1
...WHY DO i HAVE TO DiVIdE BY 10...i HAVE BEEN DiViDING BY THE BOTTOM NUMBER N I GET IT RIGHT?!!??
2007-01-10 13:32:12 · update #2
DO i HAVE TO DiViDE BY THE NUMBER ON WHICH THE VARiABLE IS ON?
2007-01-10 13:32:41 · update #3
yes
30 < 10n
3
subtract 8 from thirty
add 7n to both sides to negate the -7n
2007-01-10 13:16:41 · answer #1 · answered by Anonymous · 12⤊ 1⤋
3
2007-01-10 21:15:57
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answer #2
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answered by Scottee25 4
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0⤊
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Add 7n to both sides, giving:
30 < 10n
Divide both sides by 10, giving:
3 < n, the answer, which means that the solution set is all numbers greater than 3.
2007-01-10 21:21:31 · answer #3 · answered by Piguy 4 · 0⤊ 0⤋
38-8=30, so
30 - 7n < 3n
Add 7n to both sides:
30 < 10n
Divide by 10:
3
2007-01-10 21:18:30 · answer #4 · answered by Anonymous · 0⤊ 0⤋
38-8<10n (Move -7n to the other side of the equation)
30<10n (Simplify)
3
n>3
2007-01-10 21:17:48 · answer #5 · answered by Sean 2 · 0⤊ 0⤋
=30-7n<3n
then
30<3n+7n
So
30<10n
and
3
and thats it n>3
2007-01-10 21:24:11 · answer #6 · answered by Arash J 2 · 0⤊ 0⤋
38 - 8 - 7n < 3n
30 < 3n +7n
30 < 10n
3 < n or if you prefer n > 3
2007-01-10 21:17:43 · answer #7 · answered by ironduke8159 7 · 0⤊ 0⤋
im not positive ok? but this is what I got (im only in gr10 btw)
38-8-7n>3n
=30-7n>3n
=30>3n+7n
=30>10n
=3>n
2007-01-10 21:18:56 · answer #8 · answered by Swim+Cheerleading RULE! 2 · 0⤊ 0⤋
i agree with that guy
38 - 8 - 7n < 3n
30<10n
3
yes you have to divide by the number that the variable is on
2007-01-10 21:17:49 · answer #9 · answered by Bsktbllkd31 3 · 0⤊ 0⤋
38-8-7n<3n
V
30-7n<3n
-30 -30
-7n<3n-30
-3n -3n
-10n<-30
n>3
2007-01-10 21:19:14 · answer #10 · answered by Anonymous · 0⤊ 0⤋
well, you need to move your variable to once side.
38-8=30
30-7n>3n
add 7n to both sides
30>10n
Divide both sides by 10 to get the variable alone
3>n
2007-01-10 21:17:12 · answer #11 · answered by Jessica G 3 · 0⤊ 0⤋