1.5 multiplied by 2/3 is 1. Therefor we must multiply 7.05 buy 2/3 which is 4.7 So the cost per metre is 4 pounds 70 pence. We multiply 1 by 3.5 to get 3.5, so we must multiply 4.70 by 3.5 which is 16.45
1. 4.70
2. 16.45
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.
Here
2x2 is 4 thats the answer cause its a good answer
Answer:
B: (5, 12)
Step-by-step explanation:
Find the solution of the following system of linear equations:
3x- y=3
y=2x +2
Note that the 2nd equation has already been solved for y. Thus, subbing 2x + 2 for y in the 1st equation is the way to go:
3x - (2x + 2) = 3.
Simplifying, 3x - 2x - 2 = 3, and so x = 3 + 2 = 5.
Subbing 5 for x in the 2nd equation yields y = 2(5) + 2, or y = 12.
The solution is B: (5, 12)