Answer:
The answer is A.
Step-by-step explanation:
So we have the two equations:
To make a substitution of the second equation into the first equation, we need to isolate the <em>y </em>variable in the second equation. Thus:
Now, we can substitute this into the first equation. Therefore:
From your equation, you can see that you have a difference of two cubes (aka two cubes being subtracted): 64, which is
, and
.
There is rule for the difference of two cubes:
The difference of two cubes is equal to the difference of the cube roots times a binomial, which is the sum of the squares of the roots plus the product of the roots.
That sounds pretty confusing, but it's much easier to understand when put mathematically. Let's say our two cubes are
and
. The difference of those two cubes is:
In our problem, a = 4 (since
= 64) and b = y (since
. Plug these values into the rule to find the factor of
:
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Answer: 
Answer:
Ok
Step-by-step explanation:
Send me link I will help u
Answer:
I think it is 10
Step-by-step explanation:
Only because I believe n is still unknown and 4 must be multiplied
example
4(10 + n)
40 + 4n
now if P = 10
4(n + p)
4(n + 10)
4n + 40
Answer:
18
Step-by-step explanation:
21-n; n=3
Substitute n for 3:
Solve.
