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e-lub [12.9K]
3 years ago
15

Rationalize the denominator of sqrt -9 / (4-7i) - (6-6i) ...?

Mathematics
1 answer:
Colt1911 [192]3 years ago
5 0
√(- 9 ) / (( 4 - 7 i ) - ( 6 - 6 i )) = 3 i / ( 4 - 7 i - 6 + 6 i ) =
= 3 i / ( - 2 - i ) = - 3 i / ( 2 + i ) =
= \frac{-3i}{2 + i}* \frac{2 - i}{2 - i}= \\ =   \frac{-6i+3i ^{2} }{2- i^{2} }= \\ = \frac{-3-6i}{2+1}= \frac{-3-6i}{3}=
= - 1 - 2 i

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Work out the percentage change when a price of £10 is decreased to £8
soldier1979 [14.2K]

Answer:answer is 20%

10-8 =2

2÷10×100

=20℅



Step-by-step explanation:


3 0
2 years ago
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Makenzie has a bag that contains 6 red marbles 4 blue marbles and 14 yellow marbles if she chooses one marble from the bag what
stiks02 [169]

Step-by-step explanation:

Susan has a high chance of picking a yellow marble because she has more yellow than any color

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Stella wants to buy colored pencils that cost $3.50. She has 1 dollar, 5 quarters, 4 dimes, and 7 pennies. Does she have enough
Andrews [41]

Answer:

no

Step-by-step explanation:

Lets she how much money she has

1.00   dollars

5 * .25 = 1.25 quarters

4 * .10 = .40 dimes

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Add it all together

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3 years ago
Find the slope of the line that passes through (-20, -51) and (31, -75).
lilavasa [31]

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Step-by-step explanation:

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7 0
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The table shows the distance Randy drove on one day of her vacation
horsena [70]
Given the table showing the distance Randy drove on one day of her vacation as follows:

\begin{tabular}
{|c|c|c|c|c|c|}
Time (h)&1&2&3&4&5\\[1ex]
Distance (mi)&55&110&165&220&275
\end{tabular}

The rate at which she travels is given by

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If Randy has driven for one more hour at the same rate, the number of hours she must have droven is 6 hrs and the total distance is given by

distance = 55 x 6 = 330 miles.
4 0
2 years ago
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