So given a rectangle
sides are
_<u>x</u>_
x-5|__|x-5
x
the perimeter is 90 inches
perimeter is
x + x + (x-5) + (x-5) = 90
combine like terms
2x + 2(x-5) = 90
distribute
2x + 2x-10 = 90
combine like terms
4x - 10 = 90
add 10 to both sides
4x= 100
divide both sides by 4
x = 25
now to find the length of a side
x is 25
and x-5 is 20
to check and see if that's right:
25 + 25 + 20 + 20 =?= 90
50 + 40 =?=
90 = 90
Now to find the area
A = b * h
so
x * (x-5)
substitute
25* 20
500
The area of the rectangle is 500
Hope this helps :)
Answer:

Step-by-step explanation:
<u>-x + 4 equals </u><u>0</u><u>.</u>
<u />
<u>Substitute 4 for x:</u>
<u />
<u>Simplify:</u>
<u />

Answer:
inches
Step-by-step explanation:
well depends on how big your foot is
Easy, use these two formulas, to find Markdown:
Markdown=Original-New
and
Markdown%=

So, plug in what you know.
Markdown= $30-$20.10
M=$9.90
Now, Markdown%
Markdown%=

M%=0.33*100
M%=33
Thus, there was a 33% markdown.
Answer:
AAA
Step-by-step explanation:
AAA is not a congruence theorem or postulate.