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m_a_m_a [10]
3 years ago
9

X+2=-12 Help ASAP! PLEASE!

Mathematics
1 answer:
Lena [83]3 years ago
5 0

Hey there!

Answer = -14

Explanation:

Let's solve your equation step-by-step.

x + 2 = -12

Subtract 2 from both sides:

x + 2 - 2 = -12 - 2

x = -14

So therefore, that is how you found your answer: x = -14

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Answer:

the previous population was 62,000.

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The current population of a city = 83,700

The population of a city has increased by 35% since it was last measured.

We have to calculate the previous population before increasing 35%.

Let the previous population be p

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Therefore, the previous population was 62,000.

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A state end-of-grade exam in American History is a multiple-choice test that has 50 questions with 4 answer choices for each que
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Answer:

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Q2) She has a 99.91% probability of passing in the test.

Step-by-step explanation:

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Binomial probability distribution

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

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

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

And \pi is the probability of X happening.

For this problem, we have that:

Question 1.

There are 50 questions, so n = 50.

The student is going to guess each question, so he has a \pi = \frac{1}{4} = 0.25 probability of getting it right.

He needs to get at least 25 question right.

So we need to find P(X \geq 25).

Using a binomial probability calculator, with n = 50 and \pi = 0.25 we get that P(X \geq 25) = 0.0001.

This means that the student has a 0.01% probability of passing the test.

Question 2.

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7 0
3 years ago
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What is 851.64 in expanded notation?
navik [9.2K]
8 x 100 = 800
5 x 10= 50
1x1=    1
6 x 0.10= 0.6
4 x 0.01 = 0.04
              = 851.64
7 0
3 years ago
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