Answer:(3x-12)
Explanation:Rearranging the equation we get,
3x-12=y
which equals to
1/y=1/(3x-12)
Now,multiply both sides by x
x/y=x/(3x-12)
8x/2y=4x/y=4x/(3x-12)
Since you know a = 5√2, start by plugging that into your other equation, 2a = √2x to get an equation where x is the only variable you need to solve for:
![2a = \sqrt{2x} \\ 2(5 \sqrt{2} ) = \sqrt{2x}\\ 10 \sqrt{2} = \sqrt{2x}](https://tex.z-dn.net/?f=2a%20%3D%20%20%5Csqrt%7B2x%7D%20%5C%5C%0A2%285%20%5Csqrt%7B2%7D%20%29%20%3D%20%20%5Csqrt%7B2x%7D%5C%5C%0A10%20%5Csqrt%7B2%7D%20%3D%20%5Csqrt%7B2x%7D)
There are two ways of solving for x:
1) Remember when you simplify radicals, you break what's underneath the radical into smaller factors. If a factor repeats under the square root, you can take two of them out and put one of them outside the radical sign (see picture for example). For this problem, you would be doing the reverse of simplifying. You have a 10 on the outside on the left of the equal sign, but a 2 underneath on both sides. If the 10 was taken out, that means there had to be two 10's underneath the radical to begin with. Those two tens would have been multiplied since they are factors, so 10 x 10 = 100. That means x = 100.
2) Solve it algebraically. Square both sides, simplify, then divide by 2:
Answer: x = 100
About 6,271 people had viewed the video once it had been online for 20 days. The correct option is C.
<h3>What is exponential equation?</h3>
Exponential equation is the equation in which the exponent or part of exponents used as variables.
![fx = 33 \times (1.3)^x](https://tex.z-dn.net/?f=fx%20%3D%2033%20%5Ctimes%20%281.3%29%5Ex)
where, x is the number of days, given that x = 20
Putting the values in the equation
![f\times 20 = 33 \times (1.3)^2^0 = 6,271 \;days](https://tex.z-dn.net/?f=f%5Ctimes%2020%20%3D%2033%20%5Ctimes%20%281.3%29%5E2%5E0%20%3D%206%2C271%20%5C%3Bdays)
Thus, the correct option is C, 6,271.
Learn more about exponential equation
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