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Mazyrski [523]
2 years ago
7

Will give brainliest Evaluate the expression using the order of operations and rules for signed numbers.

Mathematics
2 answers:
Sergio [31]2 years ago
7 0

Answer:

-15

Step-by-step explanation:

Lady bird [3.3K]2 years ago
5 0

Answer:

Given 6.8(6.7 – 7.2) – 2(4.6 + 1.2)

Explanation:

-15 is your answer

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The sum of twenty and five times a number is equal to fifty five.write the expression.then solve it.
MrMuchimi
A.)20+5n=55
B.) You subtract 20 from 55 which is 35.
So your left with 5n=35, divide both sides by 5. 35÷5=7
C.)Your answer is 7.
5 0
3 years ago
Some parts of California are particularly earthquake-prone.
Lyrx [107]

Answer:

a) P(X=0)=(4C0)(0.27)^0 (1-0.27)^{4-0}=0.283982

P(X=1)=(4C1)(0.27)^4 (1-0.27)^{4-1}=0.420138

P(X=2)=(4C2)(0.27)^5 (1-0.27)^{4-2}=0.23309

P(X=3)=(4C3)(0.27)^3 (1-0.27)^{4-3}=0.057474

P(X=4)=(4C4)(0.27)^4 (1-0.27)^{4-4}=0.05314

b) For this case the value with the higher probability is X=1, so then would be the most likely value.

c) P(X \leq 1) = P(X=0) +P(X=1) = 0.283982+0.420138=0.704121 \approx 0.7041

d) P(X \leq 2) =1-{(X

e) For this case the expected value is given by:

E(X) = \mu = np= 4*0.27= 1.08

The variance is given by:

\sigma^2 = Var(X) = np(1-p) =4*0.27*(1-0.27)= 0.7884

And the deviation is:

Sd(X) = \sigma = \sqrt{0.7884}=0.89

Step-by-step explanation:

Previous concepts

The binomial distribution is a "DISCRETE probability distribution that summarizes the probability that a value will take one of two independent values under a given set of parameters. The assumptions for the binomial distribution are that there is only one outcome for each trial, each trial has the same probability of success, and each trial is mutually exclusive, or independent of each other".

Solution to the problem

Let X the random variable of interest, on this case we now that:

X \sim Binom(n=4, p=0.27)

The probability mass function for the Binomial distribution is given as:

P(X)=(nCx)(p)^x (1-p)^{n-x}

Where (nCx) means combinatory and it's given by this formula:

nCx=\frac{n!}{(n-x)! x!}

Part a

P(X=0)=(4C0)(0.27)^0 (1-0.27)^{4-0}=0.283982

P(X=1)=(4C1)(0.27)^4 (1-0.27)^{4-1}=0.420138

P(X=2)=(4C2)(0.27)^5 (1-0.27)^{4-2}=0.23309

P(X=3)=(4C3)(0.27)^3 (1-0.27)^{4-3}=0.057474

P(X=4)=(4C4)(0.27)^4 (1-0.27)^{4-4}=0.05314

Part b

For this case the value with the higher probability is X=1, so then would be the most likely value.

Part c

For this case we want this probability:

P(X \leq 1)

And we can find this probability like this:

P(X \leq 1) = P(X=0) +P(X=1) = 0.283982+0.420138=0.704121 \approx 0.7041

Part d

For this case we want this probability:

P(X \leq 2)

And we can find this probability using the complement rule like this:

P(X \leq 2) =1-{(X

Part e

For this case the expected value is given by:

E(X) = \mu = np= 4*0.27= 1.08

The variance is given by:

\sigma^2 = Var(X) = np(1-p) =4*0.27*(1-0.27)= 0.7884

And the deviation is:

Sd(X) = \sigma = \sqrt{0.7884}=0.89

6 0
3 years ago
Which set of side lengths forms a right triangle?
sergij07 [2.7K]

Answer:

My guess is 9,12 ,18  

Step-by-step explanation:

5 0
2 years ago
How do you simply -12x=12x into an x='s answer?
dedylja [7]

-12x = 12x

Start by moving all the terms with the variable you want to solve for on one side of the equation and the rest on the other side of the equation.

We will move 12x to the left side of the equation by subtracting 12x from both sides. Now your equation should look like:

-24x = 0

Isolate the variable x by dividing both sides by -24. Everything divided by 0 is equal to 0, so that means x will be equal to 0.

x = 0

Your answer is x = 0.

3 0
3 years ago
in need of help! Mrs. Sanger blended 8 3/4 gallons of iced tea with some lemonade for a picnic. if there were 13 2/5 gallons of
vodka [1.7K]
13 2/5- 8 3/4= 4 13/20 gallons of lemonade
7 0
3 years ago
Read 2 more answers
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