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Wewaii [24]
4 years ago
5

4g+r=2r-2x solve linear equation find for x

Mathematics
2 answers:
faust18 [17]4 years ago
7 0

4g + r = 2r - 2x

<u>     -2r</u>   <u>-2r        </u>

4g - r =      -2x

\frac{4g - r}{-2} =\frac{-2x}{-2}

\frac{-4g +r}{2} = x

polet [3.4K]4 years ago
5 0

Answer:

The value of the provide equation for x is x=\frac{r-4g}{2}.

Step-by-step explanation:

Consider the provided equation.

4g+r=2r-2x

We need to solve the equation for x.

Subtract 2r from both the sides

4g+r-2r=2r-2r-2x

4g-r=-2x

Divide both the sides by -2.

\frac{4g-r}{-2}=\frac{-2x}{-2}

\frac{-4g+r}{2}=x

x=\frac{r-4g}{2}

Hence, the value of the provide equation for x  is x=\frac{r-4g}{2}.

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If f(x)= 9x-8 and g(x)=x^3,what is (g o f)(1)?
lesya692 [45]

(f∘g)(3) = f(g(3))


Find g(3) by substituting x=3 in g(x)


g(x)=x²-1

g(3)=3²-1

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f*g(3) = f(g(3)) = f(8)


find f(8) by substituting x=8 in f(x):


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4 years ago
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yarga [219]

Answer:

you first start by making your equation: 45 +.25x = 70 +.15x. then subtract .15x from both sides. it should look like 45 +.10x = 70. subtract 45 from both sides then you get .10x = 25. divide 10 to both sides and you get 250. so the two companies will be the same at 250 texts.

Step-by-step explanation:

8 0
3 years ago
A pathologist knows that 14.9% of all deaths are attributable to myocardial infarctions (a type of heart disease). (Either you h
garik1379 [7]

Answer:

a) The mean number is 745 and the standard deviation is 25.18.

b) 896 deaths is a significantly high number, which means that there is cause for concern.

Step-by-step explanation:

For each death, there are only two possible outcomes. Either it is attributable to myocardial infarctions, or it is not. The probability of a death being attributable to myocardial infarctions is independent of other deaths. So we use the binomial probability distribution to solve this question.

Binomial probability distribution

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

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)}

A value X is significantly high is:

X > E(X) + 2\sqrt{V(X)}

In this problem:

p = 0.149, n = 5000

a. Find the mean and standard deviation for the number of such deaths that will occur in typical region with 5000 deaths.

E(X) = np = 5000*0.149 = 745

\sqrt{V(X)} = \sqrt{np(1-p)} = \sqrt{5000*0.149*0.851} = 25.18

The mean number is 745 and the standard deviation is 25.18.

b. In one region, 5000 death certificates are examined, and it is found that 896 deaths were attributable to myocardial infarction. Is there cause for concern? Why or why not?

Is 896 a significantly high number?

E(X) + 2\sqrt{V(X)} = 745 + 2*25.18 = 795.36

895 > 795.36

896 deaths is a significantly high number, which means that there is cause for concern.

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4 years ago
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