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nirvana33 [79]
3 years ago
5

What is the product of these numbers?

Mathematics
1 answer:
makkiz [27]3 years ago
8 0

Answer:

  0 + 5i

Step-by-step explanation:

Multiply these the way you would any binomials, then replace i² with -1.

  (1 +2i)(2 +i) = 1·2 +1·i +(2i)·2 +(2i)·i

  = 2 + i + 4i + 2i² . . . . . the partial products

  = 2 +5i -2 . . . . . . . . . . after replacement of i² = -1

  = 0 +5i

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Anna35 [415]

Answer:

y = 9

Step-by-step explanation:

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8 0
3 years ago
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Amy reached into a bag, recorded the color of the tile she picked, returned the tile and drew again. These are the tiles she has
Vedmedyk [2.9K]

Answer:

(a) P(next ball with blue) =  \frac{3}{10}       (b)  P(Not to be red) = 1-\frac{2}{5} =\frac{3}{5}

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Step-by-step explanation:

Given that,

The total outcomes of the color of tile are :-

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From the Question,

Total number of outcomes = 10

(a) What is the probability that her next draw will be blue ?

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But we have to find

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(c) If Amy draws 70 more times with the same tiles from the question above, what probability would you expect a yellow?

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drawing it 70 times we get the probability

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JL = 3x-2

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Yes, three is greater than -2
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