Answer:
6
Step-by-step explanation:
perimeter is how much it is all the way around
we know that the perimeter is 36 and the length is 12
12+12=24 (there are 2 lengths)
36-24=12
12/2=6 (there are 2 widths)
The deck is not rectangular
Width: 12
Area: 144
<em>Width:</em>
36-(12*2)=24
<em>Area</em>
<em>12*12=144</em>
(x-4)(x+5)
Find 2 numbers knowing sum (1) and product (-20). To find them, factor pairs of (-20) --> (-2,10) (-4,5). This sum is 1=b. Then, these 2 numbers are: - 4 and 5. Y=(x-4) (x+5). Hope this helped :)
thats what I got hope this helped you out