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wolverine [178]
3 years ago
8

Solve for x. Show each step of the solution. 4.5(4 − x ) + 36 = 202 − 2.5(3x + 28)

Mathematics
1 answer:
Marrrta [24]3 years ago
6 0

Answer:

sgsrgrsdg

Step-by-step explanation:


You might be interested in
2x-9y=26<br> 6x-2y=-22<br> solve by substitution step by step please
lord [1]

Answer:

y=-8

x=-23

Step-by-step explanation:

see attached document

3 0
1 year ago
The Town of Hertfordshire clerk knows that 23% of dogs in the town have completed emotional support training. Hertfordshire plan
Nataly_w [17]

Answer:

95.64% probability that under 30% of the dogs are emotional support trained

Step-by-step explanation:

For each dog, there are only two possible outcomes. Either they have completed emotional support training, or they have not. So we use the binomial probability distribution to solve this problem.

However, we are working with samples that are considerably big. So i am going to aproximate this binomial distribution to the normal.

Binomial probability distribution

Probability of exactly x sucesses on n repeated trials, with p probability.

Can be approximated to a normal distribution, using the expected value and the standard deviation.

The expected value of the binomial distribution is:

E(X) = np

The standard deviation of the binomial distribution is:

\sqrt{V(X)} = \sqrt{np(1-p)}

Normal probability distribution

Problems of normally distributed samples can be solved using the z-score formula.

In a set with mean \mu and standard deviation \sigma, the zscore of a measure X is given by:

Z = \frac{X - \mu}{\sigma}

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

When we are approximating a binomial distribution to a normal one, we have that \mu = E(X), \sigma = \sqrt{V(X)}.

In this problem, we have that:

\mu = E(X) = np = 100*0.23 = 23

\sigma = \sqrt{V(X)} = \sqrt{np(1-p)} = \sqrt{100*0.23*0.77} = 4.21

What is the probability that under 30% of the dogs are emotional support trained?

30% of 100 is 0.3*100 = 30

So this is the pvalue of Z when X = 30.

Z = \frac{X - \mu}{\sigma}

Z = \frac{30 - 23}{4.1}

Z = 1.71

Z = 1.71 has a pvalue of 0.9564.

So there is a 95.64% probability that under 30% of the dogs are emotional support trained

5 0
3 years ago
Please help me on this thank you
fomenos
A' = (1/2)*A = (8, 0)
B' = (1/2)*B = (12, 6)
C' = (1/2)*C = (6, 8)

The third choice is appropriate.
6 0
3 years ago
How many of the 0 digits are place holders in 906.903?? How do I write this answer in numeral form?
anzhelika [568]
Answer:2

The 0 in the tens place as well as the 0 in the hundredths place are both place holders. We know this because they are surrounded on both sides by no-zero numbers.

As far as NUMERICAL form goes, it is already done. 906.903 can be considered numerical form.
7 0
3 years ago
Dwayne bought 5 yards of wrapping paper. How many inches of wrapping paper did he buy?
Igoryamba
5 x 3 = 15 
15 x 12 = 180
Hope that helps! :)
8 0
2 years ago
Read 2 more answers
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