2006-10-09 10:02:26 · 5 answers · asked by Roberta A 1 in Science & Mathematics ➔ Mathematics
Hi Dear Roberta ;
AC = AD + DC
{ because ' D ' is between ' A ' & ' C ' }
AD=5x-3
DC=7x-15
- Now follow the formula ;
AC = AD + DC
AC = 5x - 3 + 7x - 15
AC = [ 5x + 7x ] + [ -3 - 15 ]
AC =12x - 18
Good Luck sweetheart.
2006-10-09 10:18:09 · answer #1 · answered by sweetie 5 · 7⤊ 0⤋
AC=5x-3 +(7x-15)= 12x-18
2006-10-09 10:04:28 · answer #2 · answered by Anonymous · 0⤊ 1⤋
If D is not the midpoint of AC, then
AD + DC = AC
5x - 3 + 7x - 15 = AC
AC = 12x - 18
-----------------------------------
If D had been the midpoint, then
AD = DC
5x - 3 = 7x - 15
-2x = -12
x = 6
5(6) - 3 = 30 - 3 = 27
27 * 2 = 54
2006-10-09 13:43:20 · answer #3 · answered by Sherman81 6 · 0⤊ 1⤋
5x-3 = 7x-15
+15 -5x
12=2x
x=6
27=27
AC = 27
2006-10-09 10:09:20 · answer #4 · answered by Anonymous · 0⤊ 1⤋
assuming D is between A and C, AC = 12x-18
2006-10-09 10:04:04 · answer #5 · answered by bequalming 5 · 0⤊ 1⤋