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3 years ago

Is the square root of 9/31 rational

Mathematics

2 answers:

Mila [183]3 years ago

6 0

Answer:

no it is not rational

Step-by-step explanation:

it just isnt hope this helps

Stells [14]3 years ago

4 0

Answer:

Step-by-step explanation:

no, 9/31 is not an irrational number. ... So we have shown that the square root of any non-square cannot be rational; hence, it is irrational.

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masha68 [24]

Answer:

14 pints

Step-by-step explanation:

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4 0

3 years ago

-4(w+1)=-24 solve for w

sineoko [7]

Answer:

w = 5

Step-by-step explanation:

Step 1: Simplify both sides of the equation.

−4(w+1)=−24

(−4)(w)+(−4)(1)=−24(Distribute)

−4w+−4=−24

−4w−4=−24

Step 2: Add 4 to both sides.

−4w−4+4=−24+4

−4w=−20

Step 3: Divide both sides by -4.

-4w/-4 = -20/-4

w=5

Hope this helped and plz mark as brainliest!

Luna G.

8 0

3 years ago

An oil refinery is located on the north bank of a straight river that is 2 km wide. A pipeline is to be constructed from the ref

hichkok12 [17]

Answer:

P is exactly 3km east from the oil refinery.

Step-by-step explanation:

Let's d be the distance in km from the oil refinery to point P. So the horizontal distance from P to the storage is 3 - d and the vertical distance is 2. Hence the diagonal distance is:

$\sqrt{(3 - d)^2 + 2^2} = \sqrt{(3 - d)^2 + 4}$

So the cost of laying pipe under water with this distance is

$800000\sqrt{(3 - d)^2 + 4}$

And the cost of laying pipe over land from the refinery to point P is 400000d. Hence the total cost:

$800000\sqrt{(3 - d)^2 + 4} + 400000d$

We can find the minimum value of this by taking the 1st derivative and set it to 0

$800000\frac{2*0.5*(3-d)(-1)}{\sqrt{(3 - d)^2 + 4}} + 400000 = 0$

We can move the first term over to the right hand side and divide both sides by 400000

$1 = 2\frac{3 - d}{\sqrt{(3 - d)^2 + 4}}$

$\sqrt{(3 - d)^2 + 4} = 6 - 2d$

From here we can square up both sides

$(3 - d)^2 + 4 = (6 - 2d)^2$

$9 - 6d + d^2 + 4 = 36 - 24d + 4d^2$

$3d^2-18d+27 = 0$

$d^2 - 6d + 9 = 0$

$(d - 3)^2 = 0$

$d -3 = 0$

d = 3

So the cost of pipeline is minimum when P is exactly 3km east from the oil refinery.

3 0

3 years ago

What is the median height of 57, 50, 48, 53, 54, 49, 50, 52, 55?

VARVARA [1.3K]

It's 53. You have to put the numbers in order, then tick off a number from each end until you get to the middle. That is your number.

8 0

3 years ago

Select the correct answer

Citrus2011 [14]

Answer:

1/5 start with A

Step-by-step explanation: 5*5=25 possible combos 5 of which will be starting with A. 5/25 can be simplified to 1/5

3 0

3 years ago

Read 2 more answers