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katrin [286]
2 years ago
11

Select the correct answer. Which expression is equivalent to the complex number 10 + 3i?​

Mathematics
1 answer:
Luden [163]2 years ago
7 0

The expression that is equivalent to the complex number 10 + 3i is (4+7i)-2i(2+3i)

<h3>Complex numbers</h3>

Complex numbers are square root of negative numbers. They are expressed as a + bi

Using the expression

(4+7i)-2i(2+3i)

Expand

4 + 7i - 4i -2i(3i)

4 + 3i - 2(-3)

4 + 6 + 3i

10 + 3i

Hence the expression that is equivalent to the complex number 10 + 3i is (4+7i)-2i(2+3i)

learn more on complex number here: brainly.com/question/10662770

#SPJ1

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Zinaida [17]
FIRST METHOD
From the frequency table, X stands for the number and F stands for the number of time that a particular number occur.
So, if we break the table down, we are going to have the following numbers:
1, 1, 2, 2, 3, 3, 3, 3, 3, 4.
The total number of occurrence =  Addition of F = 10
Mean = [Summation of all occurrence] / Number of occurrence
Mean = [1+1+2+ 2+3 +3 +3 +3 +3 + 4] / 10 = 25 /10 = 2.5
Therefore, mean = 2.5

SECOND METHOD
Mean = [ 1*2] + [2* 2] + [3 * 5] + [4*1] / [2+ 2 + 5+ 1]
Mean = 2 + 4 + 15 + 4 / 10 = 25 / 10 2.5
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5 0
4 years ago
While Leo was visiting his sister in Ashland, he bought a surfboard that was marked down 40% from an original price of $521.28.
katrin2010 [14]

Answer:

  $344.04

Step-by-step explanation:

The markdown multiplies the price by (1 -40%) = 0.60.

The tax multiplies the price by (1 +10%) = 1.10.

The two factors applied to the price make the final price be ...

  $521.28·0.60·1.10 = $344.04

The total cost of the surfboard was $344.04.

5 1
2 years ago
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