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Illusion [34]
3 years ago
8

A bag contains 3 red marbles, 4 blue marbles and 5 yellow marbles. In this experiment you reach in the bag, select a marble, rec

ord it and replace it. You then select a second marble. What is the probability that you draw 2 blue marbles?
Mathematics
1 answer:
yanalaym [24]3 years ago
3 0

Answer:

1/9

Step-by-step explanation:

the probability of one blue marble is 1/3 so to find the probability of 2 marbles you multiply it by itself.

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This graph represents a quadratic function. Which expression is a factor of the function's equation?
erastova [34]
Letter B is the answer
8 0
2 years ago
One year Terry had the lowest ERA​ (earned-run average, mean number of runs yielded per nine innings​ pitched) of any male pitch
Colt1911 [192]

Answer:

Their respective​ z-scores are:

Thomas : -2.15279

Karla : -1.40221

Which player had the better year relative to their​ peers, Terry or Karla ​? ​

Terry had a better year because he had a lower Era and he was a better pitcher.

Step-by-step explanation:

The formula for calculating a z-score is is z = (x-μ)/σ,

where x is the raw score,

μ is the population mean

σ is the population standard deviation.

any male pitcher at his​ school,

For Thomas:

z = (x-μ)/σ

x = 2.85 μ = 4.893 σ = 0.949.

z = 2.85 - 4.893/0.949

z = -2.15279

For Karla

z = (x-μ)/σ

x = 2.95 μ = 4.348 σ = 0.997.

z = (2.95 - 4.348) /0

z = -1.40221

Their respective​ z-scores are:

Thomas : -2.15279

Karla : -1.40221

Which player had the better year relative to their​ peers, Terry or Karla ​? ​(Note: In​ general, the lower the​ ERA, the better the​ pitcher.)

Terry had a better year because he had a lower Era and he was a better pitcher.

5 0
3 years ago
Paul has $30,000 to invest. His intent is to earn 15% interest on his investment. He can invest part of his money at 8% interest
jeka94

Answer:

Amount invested at 8% is $9000 and amount invested at 18% is $21000.

Step-by-step explanation:

Let amount invested at 8% be x.

Let amount invested at 18% be y.

We get the 1st equation as:

x+y=30000       ........(1)

We get the second equation as:

0.08x+0.18(y)=0.15\times30000

=> 0.08x+0.18y=4500

or getting rid of the decimal by multiplying by 100 on both sides.

8x+18y=450000          ........(2)

Multiplying (1) by 8 and subtracting from (2) we get

10y=210000  

So, y = 21000

And x+21000=30000

x = 30000-21000

So, x = 9000

Therefore, amount invested at 8% is $9000 and amount invested at 18% is $21000.

6 0
3 years ago
Math help? 10 points!
Kipish [7]
Perimeter is when you add all the sides together...but oh, no! There are two sides missing! So we have to find it. The horizontal like could be x and the vertical, the y. x would be 3 because one side is 7 and the other side is 4, so if we subtract them, we get 3. Same for the vertical, the y would be 3. (3+3=6)

Now we could add all sides to get the last choice, or 26 cm.
4 0
3 years ago
Are 3x+1 and 3x equivalent Yes or No<br><br> Explain why they are or aren't equivalent!!!
snow_tiger [21]

Answer:

NO

Step-by-step explanation:

3x + 1 and 3x are different

Step 1:  Lets put some numbers instead of x

x = 1

y = 3x + 1

y = 3(1) + 1

y = 4

y = 3x

y = 3(1)

y = 3

SEE IT IS DIFFERENT.

Attached are the graphs

4 0
3 years ago
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