9950x=8650x+250000
Subtract 8650x from both sides
1300x= 250000
Try photomath it might help
Answer:
C and D
Step-by-step explanation:
The quadratic formula is
x= (-b±√b²-4ac)/2a
The formula uses the numerical coefficients in the quadratic equation.
The general quadratic equation is ax²+bx+c where a, b and c are the numerical coefficients
So, lets try and see;
A.
![5x+4=3x^4-2\\\\=3x^4-5x-2-4\\=3x^4-5x-6\\a=3,b=-5,c=-6](https://tex.z-dn.net/?f=5x%2B4%3D3x%5E4-2%5C%5C%5C%5C%3D3x%5E4-5x-2-4%5C%5C%3D3x%5E4-5x-6%5C%5Ca%3D3%2Cb%3D-5%2Cc%3D-6)
But due to the fact that in this equation you have x⁴, the equation is not a quadratic equation thus can not be solved using this formula
B
![-x^2+4x+7=-x^2-9\\\\\\=-x^2+x^2+4x+7+9\\=4x+16](https://tex.z-dn.net/?f=-x%5E2%2B4x%2B7%3D-x%5E2-9%5C%5C%5C%5C%5C%5C%3D-x%5E2%2Bx%5E2%2B4x%2B7%2B9%5C%5C%3D4x%2B16)
C
![9x+3x^2=14+x-1\\\\\\=3x^2+9x-x-14+1\\\\=3x^2+8x-13\\\\\\a=3,b=8,c=-13\\](https://tex.z-dn.net/?f=9x%2B3x%5E2%3D14%2Bx-1%5C%5C%5C%5C%5C%5C%3D3x%5E2%2B9x-x-14%2B1%5C%5C%5C%5C%3D3x%5E2%2B8x-13%5C%5C%5C%5C%5C%5Ca%3D3%2Cb%3D8%2Cc%3D-13%5C%5C)
D.
![2x^2+x^2+x=30\\\\\\=3x^2+x-30\\\\\\a=3,b=1,c=-30](https://tex.z-dn.net/?f=2x%5E2%2Bx%5E2%2Bx%3D30%5C%5C%5C%5C%5C%5C%3D3x%5E2%2Bx-30%5C%5C%5C%5C%5C%5Ca%3D3%2Cb%3D1%2Cc%3D-30)
From the checking above, the equations will be C and D
Answer:
your answer is D.
Step-by-step explanation:
Using sine will give you 3*square root of 3