Answer:

Step-by-step explanation:
Let's start by writing what we know in mathematical terms.
A rectangle has a length that is 3 more than twice its width, means:

Now all we have to do is solve for one of these values. I'll choose W.
Rewrite the equation:

Input that information into our second equation and solve:

Find the two W values by factoring the equation (note that the Width can't be negative because you can't have a negative rectangle):

We pick the positive value 8 and plug it into our original equation to find Length:

Finally, after all that, we can use the formula of a perimeter using our newly found Length and Width values (remember not to forget "ft^2" when we get our answer):

Answer:
8x^2+4x-24
Step-by-step explanation:
A=LW
(4x-6)(2x+4)
8x^2-12x+16x-24
8x^2+4x-24
Answer:
they will eat 12 food altogether
Answer:
The answer is B
Step-by-step explanation:
plug 2 into x to see
A.
x^2 + 8
2^2 + 8
4 + 8 = 12
B.
3x^2 + 1
3(2)^2 + 1
3(4) + 1
12 + 1 = 13
C.
2x^3 + 5
2(2)^3 + 5
2(8) + 5
16 + 5 = 21
D.
x^2 + x
2^2 + 2
4 + 2 = 6
Answer:
-w²+49x²-8wx
Step-by-step explanation:
if you want how I did this it's quite lengthy so let me know if you want the process