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Marrrta [24]
3 years ago
11

{x}^{2} } " alt=" - \sqrt{49 {x}^{2} } " align="absmiddle" class="latex-formula">
simplify expression
​
Mathematics
1 answer:
kaheart [24]3 years ago
5 0

Step-by-step explanation:

Given

-  \sqrt{49 {x}^{2} }  \\  =  -  \sqrt{ {7}^{2}  {x}^{2} }  \\  =  - 7x

Hope it will help :)

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which set does square 7 belong to? integers and irrational numbers irrational and real numbers real and rational numbers rationa
pashok25 [27]

Answer:This number belongs to a set of numbers that mathematicians call rational numbers. Rational numbers are numbers that can be written as a ratio of two integers. ... square root of a number that is not a perfect square, for example , is irrational. ... The set of real numbers is all the numbers that have a location on the number ...

Step-by-step explanation:

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3 years ago
What is the probability that you flip a penny 4 times and it lands on tails all four times in a row?
Elodia [21]

Answer: 1/8

Step-by-step explanation:

Since flipping a coin once and it landing on tails is 1/2, multiply it by however many times you flip it, and that will be you're answer.

5 0
3 years ago
NEED ASAP!!
iris [78.8K]

Hey!

------------------------------------------------

Answers:

B-B-A-B

A-B-B-B

------------------------------------------------

Explanation:

We assume that the winner is from a private school (B). As we look at the options we can see that there are two options that show B at least 3 times in the span.

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Hope This Helped! Good Luck!

6 0
3 years ago
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Someone help lol thx ​
emmainna [20.7K]

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which question? you want me to answer

Step-by-step explanation:

7 0
3 years ago
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Approximately 14 percent of the population of Arizona is 65 years or older. A random sample of five persons from this population
Andreas93 [3]

Answer:

A)0.8533

Step-by-step explanation:

For each person, there are only two possible outcomes. Either they are 65 or older, or they are not. The probability of a person being 65 or older is independent of any other person. So we use the binomial probability distribution to solve this question.

Binomial probability distribution

The binomial probability is the probability of exactly x successes on n repeated trials, and X can only have two outcomes.

P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}

In which C_{n,x} is the number of different combinations of x objects from a set of n elements, given by the following formula.

C_{n,x} = \frac{n!}{x!(n-x)!}

And p is the probability of X happening.

14 percent of the population of Arizona is 65 years or older.

This means that p = 0.14

A random sample of five persons from this population is taken.

This means that n = 5

The probability that less than 2 of the 5 are 65 years or older is :

P(X < 2) = P(X = 0) + P(X = 1)

In which

P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}

P(X = 0) = C_{5,0}.(0.14)^{0}.(0.86)^{5} = 0.4704

P(X = 1) = C_{5,1}.(0.14)^{1}.(0.86)^{4} = 0.3829

P(X < 2) = P(X = 0) + P(X = 1) = 0.4704 + 0.3829 = 0.8533

So the correct answer is:

A)0.8533

3 0
3 years ago
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