Let:
P - perimeter
l - length
w - width
We know:
P = 118 m
l = 2w - 7
We replace the length with 2w - 7.
P = 2×(2w - 7) + 2w
118 = 4w - 14 + 2w
118 = 6w - 14
6w = 118 + 14
6w = 132
w = 22 meters
Answer:
w = 22 l = 37
Explanation:
Perimeter = P
Length = l
Width = w
Formula: P = 2 ( w + l ) + 2w
We know
P = 118
Solve
P = 2 (2w - 7) + 2w
<u>+14 +14</u>
<u>132</u> = <u>6w</u>
6 6
w = 22
2(22) - 7
44 - 7 = 37
l = 37
x^3-10x^2+x+120
Step-by-step explanation:
Assuming you mean roots -3, 5, 8
These happen when we have (x+3)(x-5)(x-8)=0
Expand this
(x^2-2x-15)(x-8)=0
=x^3-2x^2-15x-8x^2+16x+120
=x^3-10x^2+x+120
