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Delvig [45]
3 years ago
9

Which of the following is equivalent to

Mathematics
2 answers:
Montano1993 [528]3 years ago
8 0

Answer:

Choice B is correct.

Step-by-step explanation:

Given expression is

18-√-25

We have to simplify it.

As we know that

√-a=√-1.√a

Since we know that √-1=i

Hence,√-a=√ai

we can simplify given expression by using above equation.

18-√-25

18-√-1√25

18-i√25

18-√25i

As 25 is square of 5.

Hence ,

18-5i which is the answer.


enot [183]3 years ago
6 0

Answer:

Option (2) is correct.

18-\sqrt{-25}=18-5i

Step-by-step explanation:

Given expression 18-\sqrt{-25}

We have to find an equivalence value to the expression.

<u> Radical rule</u>,

\sqrt{-a}=\sqrt{-1} \sqrt{a}

Also,i=\sqrt{-1}

Consider the given expression,

18-\sqrt{-25}

Applying radical rule to \sqrt{-25}

\sqrt{-25}=\sqrt{-1}\sqrt{25}=5i

Thus, the expression becomes,

18-\sqrt{-25}=18-5i

Thus, option (2) is correct.

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Step-by-step explanation:

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3 years ago
Cedric and doug each had an equal amount of money. After cedric spent $35 and doug spent $28, the ratio of cedrics money to doug
uysha [10]

Answer:

Each of them had $49 at first.

Step-by-step explanation:

Given:

Cedric and Doug each had an equal amount of money.

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Cedric spent = $35

Doug spent = $28

Cedric Money left = x-35

Doug Money left = x-28

the ratio of Cedric money to Doug money was 2:3

Hence the expression can be made as;

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Now by cross multiplication method we get;

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Now we will use distributive property to elaborate the same;

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Combining common terms we get;

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Using Subtraction property we get;

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3 years ago
Coach Steroid likes his players to be big, fast, and obedient. If player A is better than player B in two of these three charact
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So i drew 12 circles and 37 circles
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3 years ago
Solve for x x squared plus 4X minus 21 equals 0
suter [353]

Answer:

x = -7 and x = 3

Step-by-step explanation:

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Then x = -7 and x = 3.

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