Geometry. A triangle has sides 3x + 7, 4x - 9, and 5x +. 6 Find the expression
that represents its perimeter.
2006-10-25 11:11:56 · 8 answers · asked by Anonymous in Education & Reference ➔ Homework Help
add em up
2006-10-25 11:12:46 · answer #1 · answered by travislizzie 2 · 0⤊ 1⤋
The triangle 3 facets pronounced under: area A: 3x + 7 area B: 4x - 9 area C: 5x + 6 area A + area B + area C = 0 *0 (perimeter) (3x + 7) + 4x - 9 + (5x + 6) = 0 team LIKE words: 3x + 4x + 5x + 7 +(-9) + 6 = 0 combine like words: (3+4+5)x + (7-9+6) = 0 persist with by with including/subtracting: 12x + 4 = 0 flow 4 to different area: 12x = - 4 resolve for 'x' 12x /12 = - 4/12 X equals::: x = - 4/12, simplified as - a million/3 (unfavorable one 0.33) PLUG IN value of - a million/3 in each and each equation for X: area A: 3( - a million/3) + 7 area B: 4( - a million/3) - 9 area C: 5( - a million/3) + 6 you are able to seek algebra exerts by google and locate examples or positioned up questions for math/algebra.
2016-10-16 10:03:49 · answer #2 · answered by Anonymous · 0⤊ 0⤋
3x+7+ 4x - 9 + 5x + 6 = 12X + 4
2006-10-25 11:13:26 · answer #3 · answered by morgulis2003 3 · 2⤊ 0⤋
(3x+7) + (4x - 9) + (5x + 6) = (3+4+5)x + (7-9+6)
= 12x + 4
2006-10-25 11:13:42 · answer #4 · answered by James L 5 · 2⤊ 0⤋
perimeter is the sum of all sides...just add those values together
3x + 7 + 4x - 9 + 5x + 6
combine like terms
12x +4
2006-10-25 11:14:17 · answer #5 · answered by dla68 4 · 2⤊ 0⤋
p=3x + 7+ 4x - 9+5x +. 6
=3x+4x+5x +7-9+0.6
=12x-1.4
2006-10-25 11:13:12 · answer #6 · answered by Mech_Eng 3 · 0⤊ 1⤋
Add the X's together and the numbers together. You'll get (3+4+5)x + (7-9+.6) = 12x - 1.4
2006-10-25 11:16:24 · answer #7 · answered by Tim J 4 · 0⤊ 1⤋
3x+7+4x-9+5x+.6
add like terms
12x -1.4
2006-10-25 11:14:54 · answer #8 · answered by just browsin 6 · 0⤊ 2⤋