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2 years ago

9 times x is 81 So what is x

Mathematics

2 answers:

murzikaleks [220]2 years ago

7 0

Answer:9

Step-by-step explanation:

9times9 is 81

Ratling [72]2 years ago

6 0

Answer:

x=9

9 x 9 = 81 So x = 9

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Step-by-step explanation:

Hope This Helps! :)

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2x+1 divided by 8x^3+18x^2+11x+2

yuradex [85]

Answer:

1/4x^2+7x+2

Step-by-step explanation:

hope this helps

8 0

2 years ago

Assume that trees are subjected to different levels of carbon dioxide atmosphere with 7% of the trees in a minimal growth condit

taurus [48]

Answer: The mean and standard deviation are 567.2 and 89.88 resp.

Step-by-step explanation:

Since we have given that

For 370 parts per million = 7% = 0.07

For 440 parts per million = 10% = 0.10

For 550 parts per million = 49% = 0.49

For 670 parts per million = 34% = 0.34

So, Mean of the carbon dioxide atmosphere for these trees would be

$E[x]=370\times 0.07+440\times 0.1+550\times 0.49+670\times 0.34=567.2$

And

$E[x^2]=370^2\times 0.07+440^2\times 0.1+550^2\times 0.49+670^2\times 0.34=329794$

So, Variance would be

$Var\ x=E[x^2]-E[x]^2=329794-567.2^2=8078.16$

So, the standard deviation would be

$\sigma=\sqrt{8078.16}=89.88$

Hence, the mean and standard deviation are 567.2 and 89.88 resp.

3 0

3 years ago

What is the value of X in the triangle attached?

Juliette [100K]

Answer:

X = 22°

Step-by-step explanation:

Accordng to Exterior Angle Sum Property , measure of an exterior angle is equal to the sum of the 2 interior opposite angles.

So,

$(2x) + (103 - x) = 6x - 7$

$= > x + 103 = 6x - 7$

$= > 6x - x = 103 + 7$

$= > 5x = 110$

$= > x = \frac{110}{5} = 22$

5 0

2 years ago

N + 4 > -9

Sav [38]

Answer:

n>-13

Step-by-step explanation:

so you subtract 4 from -9 then since your not multiplying or divinding by a negative you don't flip the sign

3 0

2 years ago

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A city has a population of 290,000 people. Suppose the population grows by 3%. What will the population be after 11 years?

LiRa [457]

Assuming it grows 3% each year it would be <span>385,700</span>

4 0

2 years ago

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