Well if I'm reading this right and it is 2 cups of sugar and 2 cups of flour then it would be an even mix 50 50
For B. x=12 would not be a solution.
To use De Moivre's theorem, we first write -2i is cis form: 0 - 2i has r = 2 and theta = 270.
Then we take the cube root, which means the new result will have r^(1/3), and the angle (theta/3). This means r = cbrt(2) and theta = 90.
This means that the answer is (cube root of 2)(cos90 + i*sin90), choice C.
I suspect the choices "3sqrt2" is actually a cube root of 2, not 3 multiplied by the square root of 2.
Answer:
6c² + 2.5 - d + 2c² - 3d = 8c² - 4d + 2.5