W=l-8
a=9
a=lw
9=(l-8)l
9=l²-8l
0=l²-8l-9
factor
0=(l-9)(l+1)
set to zero
l-9=0
l=9
l+1=0
l=-1, false length can't be negative

l=9
the length is 9 units long

8 0

3 years ago

Can someone plz help me find the GCF if number 9 plz

ivann1987 [24]

The answer should be 4, 4 can go into all of these numbers

5 0

3 years ago

Read 2 more answers

What is <br> f(x)= (x-12)(x+1)<br> in standard form?

valentina_108 [34]

Answer:

x^2-11x-12

Step-by-step explanation:

I use the box method, which makes a 2x2 box. Then you arrange you numbers based on the equation (show in image)

Then you multiply it out and get the equation

F(x)= x^2+x-12x-12

Simplify your equation and you get

F(x)= x^2-11x-12

6 0

3 years ago

How many solutions are there to the equation 5x+48+7x.=12(x+4)

ELEN [110]

$5x+48+7x=12(x+4)\\\\12x+48=12x+48\\\\L=R\\\\There\ are\ infinitly\ many\ solutions.$

5 0

2 years ago

Read 2 more answers