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pickupchik [31]
3 years ago
12

Use the distributive to simplify: 3{4x - 10}

Mathematics
1 answer:
liraira [26]3 years ago
4 0
12x-30 would be the accurate answer
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Rationalize the denominator of square root of negative 49 over open parentheses 7 minus 2 i close parentheses minus open parenth
navik [9.2K]

The answer is the option d, which is: d) \frac{-77+21i}{130}

The explanation for this problem is shown below:

1. Smplify the denominator and rewrite the numerator in this form:

\frac{7i}{7-2i-4-9i} \\\frac{7i}{3-11i}

2. Multiply the denominator and the numerator by the conjugated (3+11i) and simplify the expression, as following:

\frac{7i(3+11i)}{(3-11i)(3+11i)} \\ \frac{21i+77i^{2}}{121+9}  \\ \frac{-77+21i}{130}

3. As you can see, you obtain the expression shown in the option mentioned above.

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4 years ago
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7 0
3 years ago
-3x^2-8x+7 help please
ale4655 [162]
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What is the ratio for the surface areas of the rectangular prisms shown below, given that they are similar and that the ratio of
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the ratio of the surface areas =

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