You HAVE to write an EQUATION and then solve.
2007-02-13 16:56:26 · 9 answers · asked by HELP!!!!!!!!!!!!!!!!!!!!!!!! 1 in Science & Mathematics ➔ Mathematics
2x+7=115
x=54 for Melinda
x+7=61 for Mark
2007-02-13 17:01:01 · answer #1 · answered by Jimmy J 2 · 0⤊ 0⤋
I will refer mark as M and Milinda as L
Thus M+ L= 115 ---- (1)
and M= L+7 ---(2)
Put (2) in (1)
--> L+7+L=115
which gives L=54
Put this is (2) --> M=61
Thus mark has 61 caps and Melinda has 54
2007-02-13 17:02:57 · answer #2 · answered by TechMBA 2 · 1⤊ 0⤋
Melinda has n caps.
Mark has n + 7 caps.
n + (n+7) = 115
2n + 7 = 115
2n = 108
n = 54 = Melinda's caps
54 + 7 = 61 = Mark's caps
Check:
61 + 54 = 115
2007-02-13 17:04:50 · answer #3 · answered by ecolink 7 · 0⤊ 0⤋
we say melinda has x caps so Mark has x+7. Then we have the equation.
x+x+7=115
2x+7=115
2x=108
x=54
Mark has x+7 so mark has 54+7=61
Mark 61 Melinda has 54
2007-02-13 17:04:28 · answer #4 · answered by PhyzicsOfHockey 2 · 1⤊ 0⤋
(x+7)+y=115, subtract the 7 from 115 divide that by two, and it comes to xy=54, so melinda has 54 and Mark as 61
2007-02-13 17:02:50 · answer #5 · answered by iammindfreak 3 · 0⤊ 0⤋
mark=x
melinda=y
x+y=115
x-y=7 add
2x=122
x=61
61+y=115
y=54
Mark has 61 caps
Melinda has 54 caps
2007-02-13 17:19:38 · answer #6 · answered by yupchagee 7 · 1⤊ 0⤋
melinda has 54, mark has 61
x+x+7=115
2x+7=115
2x=108
x=54
2007-02-13 17:03:03 · answer #7 · answered by fernjj2 2 · 0⤊ 0⤋
(7+x)+x=115
2x=115-7
2x=108
x=108/2
x=54
2007-02-13 18:43:36 · answer #8 · answered by Helper X 2 · 0⤊ 0⤋
the answer is 61 if it isn't I'm sorry
2007-02-13 20:42:41 · answer #9 · answered by Anonymous · 0⤊ 0⤋