2007-08-13 06:30:25 · 6 answers · asked by sugar lady 1 in Science & Mathematics ➔ Mathematics
P = 3x + 7 + 4x - 9 + 5x + 6
P = 12x + 4
2007-08-13 07:41:52 · answer #1 · answered by Como 7 · 0⤊ 0⤋
P=3x+7+4x-9+5x+6=12x+4
P=12x+4
2007-08-13 06:34:43 · answer #2 · answered by Alexis P 2 · 0⤊ 0⤋
The perimeter of a traingle is the sum of the side lengths. Because the three side lengths are 3x + 7, 4x - 9, and 5x + 6, you can add these values in order to find the perimeter.
3x + 7 + 4x - 9 + 5x + 6
Now combine like terms:
12x + 7 - 9 + 6
Subtract 9 from 7:
12x - 2 + 6
Add 6 to -2:
12x + 4
This expression is your answer.
Hope this helped!
2007-08-13 06:40:01 · answer #3 · answered by zero_max12 2 · 0⤊ 0⤋
perimeter of a triangle = a+b+c
= (3x+7) + (4x-9) + (5x+6)
= 3x+ 7 + 4x -9 + 5x + 6
colllect like terms
= 3x+ 4x+ 5x + 7 - 9 + 6
= 12x + 4
answer= 12x + 4
2007-08-13 06:34:02 · answer #4 · answered by jay gal 3 · 0⤊ 0⤋
You have to just add up those three expressions!!
(3x + 7) + (4x - 9) + (5x + 6) = 12x + 4
2007-08-13 06:35:58 · answer #5 · answered by dy/dx 3 · 0⤊ 0⤋
12x+4
2007-08-13 06:34:38 · answer #6 · answered by mramahmedmram 3 · 0⤊ 0⤋