4 years ago

Is 4/19 a rational number?

Mathematics

1 answer:

xz_007 [3.2K]4 years ago

5 0

no because 4/19 is 0.21052631578 and that is irrational.

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You have a pot with 100 balls. 20 of them are red, 50 are blue and 30 are green. you decide to draw 5 balls from the pot without

g100num [7]

The probability of drawing exactly 5 blue balls is found as follows:
P(5 blue balls) = (50C5)/(100C5) = 0.02814 to 5 decimal places.

4 0

4 years ago

Alla and balla together drink 750ML of water. Of alla drinks 50% more than balla how much does Alla drink

Akimi4 [234]

Answer:

450 ml.

Step-by-step explanation:

Let x be the amount of water drank by Alla and y be the amount of water drank by Balla.

We have been given that Alla and Balla together drink 750 ML of water. We can represent this information as:

$x+y=750...(1)$

We are also told that Alla drinks 50% more than Balla. We can represent this information as:

$x=1.5y...(2)$

From equation (1) we will get,

$y=750-x$

Upon substituting this value in equation (2) we will get,

$x=1.5(750-x)$

Upon distributing 1.5 to right hand side of the equation we will get,

$x=1125-1.5x$

Upon adding 1.5x to both sides of equation we will get,

$x+1.5x=1125-1.5x+1.5x$

$2.5x=1125$

Let us divide both sides of our equation by 2.5.

$\frac{2.5x}{2.5}=\frac{1125}{2.5}$

$x=450$

Therefore, Alla drank 450 ml of water.

8 0

3 years ago

Sally is completely unprepared for a three-question multiple-choice pop quiz, so she randomly guesses the answer to each questio

timurjin [86]

There are 3 questions and 4 choices.
So she has 1/4 of a chance of getting each question right.
Now if you multiply all her odds 1/4 x 1/4 it would become 1/16. Therefore she has 1/16 of a chance of getting a 2/3

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4 years ago

Evaluate the expression for the given value of the variable. 51 + 3/7r. R= - 1/2

mel-nik [20]

The answer is -50.429

You would replace the -1/2 where r is at, divide 7& -1/2, then add it to 51

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3 years ago

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tatyana61 [14]

5x -30 = 2x + 6

5x = 2x + 36

3x = 36

x= 12

3 0

3 years ago