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2 years ago

Equations must have combining like terms answer must be x=12

Mathematics

1 answer:

TEA [102]2 years ago

7 0

Answer:

suppose

2x-x=12

x=12this is imagery answee

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The amounts of nicotine in a certain brand of cigarette are normally distributed with a mean of 0.917 g and a standard deviation

Nutka1998 [239]

Answer:

$z = \frac{0.872-0.917}{\frac{0.303}{\sqrt{37}}}= -0.903$

And we can find this probability to find the answer:

$P(z$

And using the normal standar table or excel we got:

$P(z$

Step-by-step explanation:

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

$X \sim N(0.917,0.303)$

Where $\mu=0.917$ and $\sigma=0.303$

We have the following info from a sample of n =37:

$\bar X= 0.872$ the sample mean

And we want to find the following probability:

$P(\bar X \leq 0.872)$

And we can use the z score formula given by;

$z=\frac{x-\mu}{\frac{\sigma}{\sqrt{n}}}$

And if we find the z score for the value of 0.872 we got:

$z = \frac{0.872-0.917}{\frac{0.303}{\sqrt{37}}}= -0.903$

And we can find this probability to find the answer:

$P(z$

And using the normal standar table or excel we got:

$P(z$

6 0

3 years ago

What is the vertex form of 2x^2+10x-5

Nataly_w [17]

Two Solutions
1. x =(10-√140)/4=(5-√ 35 )/2= -0.458

2. x =(10+√140)/4=(5+√ 35 )/2= 5.458

7 0

3 years ago

How to graph 9x+5y=-45

lilavasa [31]

9x +5y= -45 put in standard form y= mx+b coefficient of x is the slope, b is the y intercpept 5y= -9x -45 y= -9/5 x -45 graphing will start at -45 on the y axis from that point go down 9 to the right 5 for the slope continue and graph minimum 2 points to draw the line hope this helps

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3 years ago

Can someone answer and show me how you answered both of these equations.(it’s simple division)

valina [46]

Answer:

first is 9.08

second is 17.34

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3 years ago

Tetras cost $3.99 each. you can spend at most $25. how many tetras can you buy for your aquarium

Ne4ueva [31]

You can buy at most 6

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2 years ago