the width of a rectangle is 6inches less than twice it’s length. Find the dimension of the rectangle if it’s area is 108 square inches

Respuesta :

Answer:

Width = [tex]12[/tex]   Length = [tex]9[/tex]

Step-by-step explanation:

We have to first find an equations with the given variables:

[tex]w = 2L - 6[/tex]

Now apply the area format:

[tex]Length * Width[/tex]

Since the area is 108 square inches

[tex]108 = l * w[/tex]

[tex]108 = l(2l-6)[/tex]

[tex]108 = l(2l) + l(-6)[/tex]

[tex]108 = 2l^2 - 6l[/tex]

Simplify:

[tex](l-9) * (l+6) = 0[/tex]

Since no number can be negative

[tex]w = 2*9(L)-6[/tex]

[tex]w = 12[/tex]

[tex]l=9[/tex]