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3 years ago

10

in an aquarium 2/5 of the fish are surgeonfish of these 3/4 are yellow tangs what fraction of all fish in the aquarium are yello

w tangs

1 answer:

Ilya [14]3 years ago

8 0

Would it be 7 over 20

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nikitadnepr [17]

Answer:

The value of x is $\frac{-2}{5}$ .

Step-by-step explanation:

Given expression is:

$\frac{2}{3}(x-2)=4x$

We have to solve this for x.

First we will multiply both sides of the equation by 3

$3*\frac{2}{3}(x-2)=4x*3$

2(x-2) = 12x

2x-4=12x

Now we will be subtracting 2x from both sides of the equation

2x-2x-4=12x-2x

-4=10x

10x=-4

Dividing both sides by 10

$\frac{10x}{10}=\frac{-4}{10}\\\\x=\frac{-2}{5}$

Hence,

The value of x is $\frac{-2}{5}$ .

8 0

3 years ago

in a certain game, a fair die is rolled and a player gains 20 points if the die shows a 6. if the die does not show a 6, the pla

BaLLatris [955]

The expected gain or loss is an illustration of mean and expected values.

The expected total gain is 83 points

The given parameters are:

Addition of 20 points for rolling a 6
Removal of 3 points for not rolling a 6

The probability of rolling a 6 in a fair die is 1/6.

The probability of not rolling a 6 in a fair die is 5/6.

So, the expected gain in each game is:

$\mathbf{E(x) = 20 \times \frac 16 - 3 \times \frac 56}$

$\mathbf{E(x) = \frac{20}6 - \frac{15}6}$

Take LCM

$\mathbf{E(x) = \frac{5}6}$

$\mathbf{E(x) = 0.83}$

The number of games is 100.

So, the expected gain is:

$\mathbf{Gain = 100 \times 0.83}$

$\mathbf{Gain = 83}$

Hence, the expected total gain is 83 points

Read more about expected value at:

brainly.com/question/13499496

5 0

3 years ago

Calculate the interquartile range of the following data set: 36, 54, 49, 39, 41, 48, 50

SVEN [57.7K]

50-36=14 the answer is 14

3 0

4 years ago

What is the area of the circle when the diameter is 2

mel-nik [20]

Answer:

3.14

Step-by-step explanation:

because its diameter that is 2, you divide it in half which should be one, that will be the radius. to get the area from the radius you multiply it by its self and multiply that by 3.14 which is the circumference of a circle.

7 0

4 years ago

Helpppppp meee please

Volgvan

Answer:

7.25 and 7.20

Step-by-step explanation:

I calculated and got it correct

4 0

3 years ago

Read 2 more answers