Answer:
![2 \sqrt{14}](https://tex.z-dn.net/?f=2%20%5Csqrt%7B14%7D%20)
Step-by-step explanation:
you can split the square root of 54 into
![\sqrt{4}](https://tex.z-dn.net/?f=%20%5Csqrt%7B4%7D%20)
and
![\sqrt{14}](https://tex.z-dn.net/?f=%5Csqrt%7B14%7D%20)
Dy/dx=25, 35, 45, 55
d2y/dx2=10,10,10 (this constant just proves that it is a quadratic relation)
Now we can set up a system of equations for ax^2+bx+c
16a+4b+c=80, 9a+3b+c=45, 4a+2b+c=20 getting differences
7a+b=35, 5a+b=25 and again
2a=10, a=5, making 7a+b=35 become:
7(5)+b-35, b=0, making 4a+2b+c=20 become:
4(5)+2(0)+c=20, c=0 so
y=5x^2
So the constant of variation for this quadratic is 5.
(x^3 - y^3)(x^3 + y^3)
You can get this by factoring based on the a^2 - b^2 model
Answer:
x=12
Step-by-step explanation:
Cross multiply them:
84 = 7x
Divide By 7 on both sides
12 = x
And there is the answer. Sorry I couldn't explain better Im really not feeling good today