Question 17 A swimming pool holds 540,000 liters of water. The pool has two drainage pipes. When the pool is completely full, the first pipe alone can empty it in minutes, and the second pipe alone can empty it in minutes. When both pipes are draining together, how long does it take them to empty the pool?

Answers

Answer 1

Answer:

Answer:

Step-by-step explanation:

: A swimming pool holds 600,000 liters of water. ... When the pool is completely full, the first pipe alone can empty it in 200 minutes, and the ... When both pipes are draining together, how long does it take them to empty the pool? ... The second pipe empties the pool at 600,000/120 =5000 litres per minute.

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What is the factor of 16^2-81

Answers

this is the diffiarence of two perfect squares. this should be memorised, but if not here it is

a^2-b^2=(a-b)(a+b)
so 16^2-81=16^2-9^2
so the answer is (16-9)(16+9)

What are the rational numbers of -12,0,35,4.85,√12,√36,19/6,-10/11,1.4949949994

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All of those numbers are rational, except the square root of 12.

A rectangle with an area of 24 square units has length x+1 and width 4x-6. find the value of x.

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$area = length \cdot width \n \nA = 24 s^2 \n \n l=x+1 , \ \ w=4x-6 \n \n A=lw\n \n24 =(x+1)(4x-6)$

$24 =4x^2-6x+4x-6 \n \n4x^2-6x+4x-6 -24=0\n \n4x^2-2x-30=0 \ \ / :2\n \n2x^2-x-15=0 \n \na=2, \ b=-1 , c= -15$

$\Delta =b^2-4ac = (-1)^2 -4\cdot2\cdot (-15) = 1+120=121\n \nx_(1)=(-b-√(\Delta) )/(2a)=(1-√(121))/(2*2 )=( 1-11)/(4)=(-10)/(4)=- (5)/(2) \n \nx_(2)=(-b+√(\Delta) )/(2a)=(1+√(121))/(2*2 )=( 1+11)/(4)=(12)/(4)=3 \n \nUse \ positive \ value \ of \ x : \n \n x =3$

Can someone tell me how to evalaute 6!

Answers

Where is the question?

If you're referring to factorials, then,

6! = 6*5*4*3*2*1 = 720

You start with 6 and count your way down to 1, multiplying along the way.

On a coordinate plane, polygon GHIJ translates 8 units to the left to form polygon G'H'I'J'. Which of the following equations is not necessarily true?

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When you translate a figure, none of the lengths change and none of the angles change. The only equation you listed that does not equate two translated lengths or two translated angles is G'H' = 8 units. There is nothing in the statement of the problem that requires this to be true.

Answer:

It's D: m∠HI'J = m∠H'IJ'

Step-by-step explanation:

Round 10.065 correct to 1 decimal place

Answers

Answer:10.1

Step by step explanation:

Round up to ten
6 rounds up so it’s just 10.1

the answer is 10.1 because 6 is greater than 5

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