Given that the area is equal to twice the perimeter and the dimensions are:
length=4x ft, width=(x+6) ft
the perimeter will be:
P=2(L+W)
P=2(4x+(x+6))
P=2(4x+x+6)
P=2(5x+6)
P=(10x+12)
Area of the rectangle is:
A=4x(x+6)
A=4x²+24x
but:
2P=A
thus
2(10x+12)=4x²+24x
20x+24=4x²+24x
thus
4x²+4x-24=0
x²+x-6=0
x²-2x+3x-6=0
x(x-2)+3(x-2)=0
(x-2)(x+3)=0
thus the answer is:
x=-3 or x=2
thus
length=4x=4*2=8 ft
width=(x+6)=(2+6)=8 ft
Answer:
4t/9 + 18
Step-by-step explanation:
I'm not 100% sure of this I think its as follows:-
Prob(Lauren then Isabel picked) = 1/12 * 1/11 = 1/132
Answer: The answer is B, a car traveling 25 km/h.
This question is checking to see if you remember what the three angles
of any triangle always add up to. Apparently you don't, or you would not
need to go out looking for somebody who does.
The three angles inside every triangle always add up to 180° .
If two of them add up to 135° , then that leaves
(180° - 135°) = 45° .
for the one remaining angle.