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dolphi86 [110]
2 years ago
11

Simplify 2/3x-4/9y+x+y

Mathematics
2 answers:
EastWind [94]2 years ago
7 0

Answer:

A. 5/3x+5/9Y

Step-by-step explanation:

Helga [31]2 years ago
3 0

.............idk............

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What’s greater 14/7 or 2/4
aleksandr82 [10.1K]
I think 2/4 but I'm not 100% sure sry
8 0
3 years ago
Consider the probability that greater than 94 out of 153 people will not get the flu this winter. Assume the probability that a
Hatshy [7]

Answer:

0.8212 = 82.12% probability that greater than 94 out of 153 people will not get the flu this winter.

Step-by-step explanation:

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:

p = 0.65, n = 153. So

\mu = E(X) = 153*0.65 = 99.45

\sigma = \sqrt{V(X)} = \sqrt{np(1-p)} = \sqrt{153*0.65*0.35} = 5.9

Consider the probability that greater than 94 out of 153 people will not get the flu this winter

This probability is 1 subtracted by the pvalue of Z when X = 94. So

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

Z = \frac{94 - 99.45}{5.9}

Z = -0.92

Z = -0.92 has a pvalue of 0.1788

1 - 0.1788 = 0.8212

0.8212 = 82.12% probability that greater than 94 out of 153 people will not get the flu this winter.

7 0
3 years ago
The terminal side of an angle in standard position passes through P(–3, –4). What is the value of tan 0?
Murrr4er [49]

Answer:

tan(θ) = 4/3

Step-by-step explanation:

The tangent is the ratio of the y-coordinate to the x-coordinate:

... tan(θ) = (-4)/(-3) = 4/3

6 0
3 years ago
Find x<br>1. x + 10 &lt; -7<br>2. -3x - 4 &gt; 5<br>Help me please
oksian1 [2.3K]

1)

x+10<-7

bring 10 to the other side

x<-10-7

x<-17

2)

-3x-4>5

bring -4 to the other side

-3x>9

divide -3 at the other side, since it is negative it changes to less than

x<-3

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2 years ago
What is the x intercept of y=x+3
OleMash [197]
To find the x intercept just substitute your y value for 0 then solve for x.

So you get 0= x+3 and then you get x=-3 which is at (-3,0).
3 0
3 years ago
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