The equation would be 30+3m=162 then you solve the problem
Descares Theorem says that the number of roots of a polynomial is equal to its highest exponent, and the roots could be real and/or imaginary (complex).
However is their is one complex root (a + i.b), it's conjugate is also
a root (a-i.b).
In the equation x⁴ - 4x³ - 2x² + 12x + 9 = 0, we have already 3 roots, then the 4rth cannot be a complex one since we don't have a fifth for its conjugate.
I=400(0.04)(5)
Interest is 80 dollars of interest
400+80=480
I think that is the answer you're looking for :)
The answer is B
Hope it helps!
since triangles are similar
=》 21/9 = x/3
=》 x = 21×3/9 =7
