5 minutes later the hand moves five minutes later
Let's call the width of our rectangle 
and the length 
. We can say 
, since the length is equal to 4 cm greater than the width.
Also remember that the perimeter of a rectangle is the sum of two times the width and two times the length, or 
. To solve this problem, we can substitute in the information we know, as shown below:
Now, we can substitute in the width we found into the formula for length, which is :
The width of our rectangle is 
cm and the length of our rectangle is 
Qr=1/2 mn = ms
mn=2 ms=12
ln^2=lm^2+mn^2 using phythagoras rule
ln^2=400
ln=20
A root of a polynomial doesn't mean it is a square root of!!!!!!
P(x)=3(x-5)(x-2)=3x²-21x+30
f (x)= 3 x power point 2 - 21 x + 30
The answer is 4. Hope this helps!
-Belle
