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bearhunter [10]
2 years ago
11

What is the sum of √-2 and √-18? O 4√2 O 4√21 O 5√2 O 5√21

Mathematics
1 answer:
Deffense [45]2 years ago
6 0

Answer:

4 \sqrt{2}  \: i

Step-by-step explanation:

\sqrt{ - 2}  +  \sqrt{ - 18}  \\ ( \sqrt{2}  \times  \sqrt{ - 1} ) + ( \sqrt{18}  \times  \sqrt{ - 1} ) \\ ( \sqrt{2}  \times  \sqrt{ - 1} ) + (3 \sqrt{2}  \times  \sqrt{ - 1} ) \\  \sqrt{2} i + 3 \sqrt{2} i \\  = 4 \sqrt{2} i

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4 years ago
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3 years ago
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STatiana [176]

Answer:

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Step-by-step explanation:

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6 0
3 years ago
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What is the inverse of the following statement: if he speaks arabic, he can act as the interpreter.
marissa [1.9K]
Based on the given sentence above, the dependent clause is located at the first part of the sentence, then the independent clause follows next. Now, the correct inverse for it will be this:
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6 0
4 years ago
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Can anyone else answer this?
nevsk [136]

ok Kirishima

Answer:

The height of the triangle is 6.5cm

Step-by-step explanation:

First of all we need to use the formula to calculate the area of a triangle:

a = area = 45.5 cm²

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h = height

a = (b * h) / 2

we replace with the known values

45.5cm² = (14cm * h) / 2

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