A five year old can do algebra. They can if they are one of those VERY rare children. By rare children I mean their brains can process work faster than others making them able to understand it yet being so young. Also maybe because they had learned quickly they had found a algebra book and started to self teach themselves how to do that. Because if a child has a strong mind and can grasp things and learn for themselves they can learn it from looking at complete problems. Then solve them. I have seen kids be able to do math like this at a young age because they were quick at grasping the information. Also it could be that they had copied a basic formula for algebra off of a website or math book and just put their numbers in and started solving it like that. Also it could just be that they had learned it form a parent or older sibling because they were smart enough they were able to already be learning. Finally it could just be that they are a mathematical genius and were able to complete things like that themselves.
Answer:
I’d say the first one!!!
Step-by-step explanation:
Most reasonable
=x^2-8x+16-16
= (x-4) ^2-16
=[(x-4) -4][(x-4) +4]
=(x-8) x
Answer:
2
Step-by-step explanation:
puting right terms together to find value of y
We can solve for the value of x using the formula:
V = l w h
where,
h = x the size of the cut since it would form the walls of
the rectangle
<span>w = 8.5 – 2x =
it is subtracted by 2x since two sides will be cut</span>
l = 11 – 2x
Substituting:
V = x (8.5 − 2x) (11 − 2x)
Expanding the expression:
V = 93.5 x – 39 x^2 + 4 x^3
To solve the maxima, we have to get the 1st
derivative dV / dx then equate to 0. dV / dx = 0:
dV / dx = 93.5 – 78 x + 12 x^2
0 = 93.5 – 78 x + 12 x^2
We get:
x ≈ 1.585 in and x ≈ 4.915 in
Therefore Anya’s suggestion of 1.5 inches would create the
larger volume since it is nearer to 1.585 inches.
There can be different volumes since volume refers to the
amount of space inside the rectangle. They can only have similar perimeter and
surface area, but not volume.
It is restricted to <span>0
in. < x < 4.25 in. because our w is 8.5 – 2x. Going beyond that value
will give negative dimensions.</span>
