(-3 √-9)^2 write your answer in standard form a ib

1 answer:

4 0

If you would like to write (-3 + √-9)^2 in a standard form a + i * b, you can do this using the following steps:

(-3 + √-9)^2 = (-3)^2 - 2 * 3 * √-9 + (√-9)^2 = 9 - 6 * 3 * i - 9 = 0 - 18 * i = -18 * i

The correct result would be -18 * i.

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Find the number of 3-digit numbers formed using the digits 1 to 9, without repetition, such the numbers either have all digits l

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Answer: 120

Step-by-step explanation:

The total number of digits from 1 to 9 = 10

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Since repetition is not allowed so we use Permutations , then the number of 3-digit different codes will be formed :-

$^5P_3=\dfrac{5!}{(5-3)!}=\dfrac{5\times4\times3\times2!}{2!}=5\times4\times3=60$

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Similarly, Number of 3-digit different codes will be formed :-

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Hence, the required number of 3-digit different codes = 60+60=120

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3 years ago

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Answer:

a) Yes.

b) Yes.

Step-by-step explanation:

Meredith and Hillary both want coffe, but they don't know if the other two people do, therefore they can't know if everyone want coffee. If they didn't want coffee, their answer would have been just "no".

Aly knows that she doesn't want coffee, therefore she knows that not everyone wants coffee.

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2 years ago

How to solve step by step

jasenka [17]

X² = 16

the way to isolate your x variable is to square root both sides

√x² = √16
x = ± 4

so your answers are 4 and -4

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Describe the relationship between the terms in each arithmetic sequence. Then

shtirl [24]

Answer:

(a) The sum of the previous term and 9