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4 years ago

The value of sqrt-9 is not -3 because

Mathematics

2 answers:

Umnica [9.8K]4 years ago

7 0

<u>Answer with explanation:</u>

The value of square -9 is not -3 ( $\sqrt { - 9 } \neq - 3$ ).

It is because we cannot take a square root of a negative number since any number multiplied by itself is a positive number so you never get a negative value.

Therefore, it given an error if you try to take a square root of a negative number on a calculator.

fenix001 [56]4 years ago

5 0

Answer:

The value of √-9 is not -3 because we cannot take the square root of negative numbers

Step-by-step explanation:

It is not possible to take square root of a negative number.

If any positive number we can take its square roots.

-9 is a negative number.

√9 = ±3 means that,

√9 = 3 or √9 = -3

3 * 3 = 9 and -3 * -3 = 9

Therefore the value of √-9 is not -3

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3 years ago

What is -x-3y=-3 and 2x+3y=5 using elimination method?

xxTIMURxx [149]

Answer:(2,1/3)

Step-by-step explanation:

-x-3y=-3

2x+3y=5

_________First solve for x since y is 0. -3y+3y=0

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1x/1= 2/1

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Now substitute your x answer into any equation to find y I used second equation

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4 years ago

If a game consists of picking a number from a bag of beans numbered 2, 2, 3, 4, and 5 and flipping a coin, which probabilities a

Semenov [28]

The true statement is (d) none of the above

<h3>Missing information</h3>

I. P(3 and tail)

II. P(even and head)

III .P(odd and head)

<h3>How to determine the equivalent probabilities?</h3>

We start by calculating each probability

There is only one 3 in the 5 numbers.

So:

P(3) = 1/5

The probability of a tail in a coin is:

P(Coin) = 1/2

So, we have:

P(3 and tail) = 1/5 * 1/2

P(3 and tail) = 1/10

There are three even numbers in the 5 numbers.

So:

P(even) = 3/5

The probability of a head in a coin is:

P(head) = 1/2

So, we have:

P(even and head) = 3/5 * 1/2

P(even and head) = 3/10

There are two odd numbers in the 5 numbers.

So:

P(odd) = 2/5

The probability of a head in a coin is:

P(head) = 1/2

So, we have:

P(odd and head) = 2/5 * 1/2

P(even and head) = 1/5

By comparing the results, none of the probabilities are equal.

Hence, the true statement is (d) none of the above

Read more about probability at:

brainly.com/question/25870256

#SPJ1

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2 years ago

The average salary for a teacher is $55,000 per year. A physician makes on average $220,000. If you consider the earning potenti

Evgen [1.6K]

Answer:

The difference between the teacher's earnings as compared to the physician's earning over 30 years is $4,950,000

Step-by-step explanation:

Given as :

The average salary for a teacher in a year = $55,000 per year

The average salary for a physician in a year = $220,000 per year

Let The difference between the teacher's earnings as compared to the physician's earning over 30 years = $x

Now,

The average salary for a teacher for 30 years = $55,000 × 30 = $1,650,000

The average salary for a physician for 30 years = $220,000 × 30 = $6,600,000

So,

The difference between the teacher's earnings as compared to the physician's earning over 30 years = The average salary for a physician for 30 years - The average salary for a teacher for 30 years

Or, $x = $6,600,000 - $1,650,000

∴ x = $4,950,000

So, The difference between the teacher's earnings as compared to the physician's earning over 30 years = x = $4,950,000

Hence, The difference between the teacher's earnings as compared to the physician's earning over 30 years is $4,950,000 . Answer

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3 years ago