2x - 5
___________
l l
l l x
l__________ l
p=50 in
2006-07-22 17:33:25 · 5 answers · asked by donno 1 in Education & Reference ➔ Homework Help
X=10 L=10 W=15
2006-07-22 17:38:26 · answer #1 · answered by jasmine m 3 · 0⤊ 0⤋
Perimeter equation
P = 2L + 2W
From the statement
P = 50
W = 2x - 5
L = x
Insert the above information into the perimeter equation
P = 2l + 2W
50 = 2x + 2(2x - 5)
50 = 2x + 4x- 10
The distributive property 2(2x - 5)
50 = 6x - 10
Adding like terms 2x + 4x = 6x
50 = 6x - 10
+10 +10
add 10 to both sides
60 = 6x
60/6 = 6x/6
Divide 6 from both sides
10 = x
The answer is x = 10
The Length equals 2x. 2 (10) = 20
The width equal. 2{2(10) - 5] =2[20 - 10] = 40 - 10 = 30
20 = 30 = 50
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Check
50 = 2x + 2(2x - 5)
50 = 2(10) + 2[2(10) - 5]
50 = 20 + 2[20 -5]
the richt side of the equation. multiplication of 2(10) = 20 inside the brackets
50 = 20 + 40 - 10
Right side of the equation the distributive proberty 2[20 -5] = 40 - 10
50 = 60 - 10
50 = 50
2006-07-23 04:57:18 · answer #2 · answered by SAMUEL D 7 · 0⤊ 0⤋
Equation: 2*x + 2*(2x-5) = 50
6x-10 = 50
6x = 60
x = 10
2 x -5 = 15
15+15+10+10 = 50
2006-07-22 17:49:11 · answer #3 · answered by Anonymous · 0⤊ 0⤋
P=50, w=2x-5, L=?
P= 2L + 2w
Let L be x, P = 2x + 2w
Let's plug in 50= 2x + 2 ( 2x - 5)
50 = 2x + 4x - 10
50 = 6x - 10
6x = 50 + 10
6x = 60
x = 10
So, w = 2x - 5
= 2 (10) -5 = 20 - 5 = 15
2006-07-23 08:06:18 · answer #4 · answered by Hsu Thet H 2 · 0⤊ 0⤋
the answer is L = 10 and W = 15, by using the equation 50=2X+2(2X-5), and follow the rules. the perimeter of a rectangle is 2L+2W, substitute what you know and what they gave you to get the above equation.
2006-07-22 17:44:36 · answer #5 · answered by Kilgore 1 · 0⤊ 0⤋