3 years ago

B.

Mathematics

1 answer:

laiz [17]3 years ago

6 0

The answer is 200 because you multiply 20x12 you get 200

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Compound interest earns interest on both the principal and the interest already earned.

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Step-by-step explanation:

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A score of 17 on a math test results in a mark of 68%. What score would give you a mark of 100%?

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What are the real and complex solutions of the polynomial equation X^3-216=0

vazorg [7]

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$6,\ -3+3\sqrt{3}i,\ -3-3\sqrt{3}i$

Step-by-step explanation:

Factor the equation $x^3-216=0$ using formula for difference of the cubes:

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then

$x-6=0\ or\ x^2+6x+36=0.$

1. The equation $x-6=0$ has real solution $x=6.$

2. The equation $x^2+6x+36=0$ has negative discriminant $D=6^2-4\cdot 36=36-144=-108,$ then it has two complex solutions

$x_{1,2}=\dfrac{-6\pm 6\sqrt{3}i}{2}=-3\pm3\sqrt{3}i.$

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