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frozen [14]
3 years ago
12

Show two different ways to solve 2/3(3x+6)=4x+3

Mathematics
1 answer:
alexgriva [62]3 years ago
3 0

Answer:

In the two different ways we have solved the given equation as x=\frac{1}{2}

Step-by-step explanation:

Given expression is \frac{2}{3}(3x+6)=4x+3

To simplify the given expression in two ways:

First way:

Given  \frac{2}{3}(3x+6)=4x+3

\frac{2}{3}(3x+6)=4x+3

\frac{6x+12}{3}=4x+3

Multiplying 3 on both sides

3\times (\frac{6x+12}{3})=3\times (4x+3)

6x+12=12x+9

6x+12-12x-9=0  (adding the like terms)

-6x+3=0

3(-2x+1)=0

Dividing by 3 on both sides

3(-2x+1)\times \frac{1}3}=0\times \frac{1}3}

(-2x+1)=0

-(2x-1)=0

2x-1=0

x=\frac{1}{2}

Therefore the given expression is solved that x=\frac{1}{2}

Another way:

Given  \frac{2}{3}(3x+6)=4x+3

\frac{2}{3}(3x+6)=4x+3

2(\frac{3x}{3}+\frac{6}{3})=4x+3

2(x+2)=4x+3

2x+4=4x+3

4x+3-2x-4=0 (adding the like terms)

2x-1=0

x=\frac{1}{2}

Therefore the given expression is solved that x=\frac{1}{2}

In the two different ways we have solved the given equation as x=\frac{1}{2}

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Complete Question

The complete question is shown on the first uploaded image

Answer:

The value of  y  =  122^o

The value of  x = 61^o

Step-by-step explanation:

Generally the total angle that make up a circle is

      \theta _T = 360

From the diagram we see that

    \theta _T  =  y^o + 238^o

=>    y^o  =  360  -238

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4 0
3 years ago
A food processor packages orange juice in small jars. The weights of the filled jars are approximately normally distributed with
Ratling [72]

Answer:

P(X>10.983)=P(\frac{X-\mu}{\sigma}>\frac{10.983-\mu}{\sigma})=P(Z>\frac{10.983-10.5}{0.3})=P(z>1.61)

And we can find this probability using the complement rule and with excel or the normal standard table:

P(z>1.61)=1-P(z

Step-by-step explanation:

Previous concepts

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

The Z-score is "a numerical measurement used in statistics of a value's relationship to the mean (average) of a group of values, measured in terms of standard deviations from the mean".  

Solution to the problem

Let X the random variable that represent the weights of a population, and for this case we know the distribution for X is given by:

X \sim N(10.5,0.3)  

Where \mu=10.5 and \sigma=0.3

We are interested on this probability

P(X>10.983)

And the best way to solve this problem is using the normal standard distribution and the z score given by:

z=\frac{x-\mu}{\sigma}

If we apply this formula to our probability we got this:

P(X>10.983)=P(\frac{X-\mu}{\sigma}>\frac{10.983-\mu}{\sigma})=P(Z>\frac{10.983-10.5}{0.3})=P(z>1.61)

And we can find this probability using the complement rule and with excel or the normal standard table:

P(z>1.61)=1-P(z

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3 years ago
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TEA [102]

x\Delta y=x-5y\\\\3\Delta(-4)\qquad\text{put the values x = 3 and y = -4 to the expression x - 5y}:\\\\3\Delta(-4)=3-5(-4)=3+20=23

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Answer: the max marks he could have gotten are 224

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