All categories

3 years ago

There is a bag filled with 5 blue and 6 red marbles.

Mathematics

1 answer:

inn [45]3 years ago

4 0

Answer:

5/11*5/11=25/121

Step-by-step explanation:

There are 6+5 marbles.

Of those, 5 are red.

The chances of drawing a red marble are 5/11

Since you replace the marble you drew, the chances each draw remain 5/11

You cannot draw two red marbles without drawing a red marble on your first draw, so the odds of you making a second draw are 5/11. The odds of that also being red are 5/11… but we only care about that 5/11ths the time

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suppose a normal distribution has a mean of 120 and a standard deviation of 10. What is P( x>= 100)?

fredd [130]

Answer: The answer is D

Step-by-step explanation:

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3 years ago

Amaka buys 4 rulers and a pencil and these cost the same as 2 rulers and 4 pencils. If a pencil cost #8, how much does a ruler c

LekaFEV [45]

Answer: ruler cost $12

Step-by-step explanation:

step 1

Let cost of ruler be represented as r

and cost of pencil be represented as p

we were given that

4 rulers and a pencil and these cost the same as 2 rulers and 4 pencils which is expressed as

4r + p = 2r+ 4p

and cost of pencil= $8

therefore

sTEP 2--- Solving

4r+ 8 = 2r+ 4 x8

4r+ 8 = 2r+ 32

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3 years ago

What is the value of (3-54(2)- 16:22 O _40 -16 o 24 56

il63 [147K]

So the right answer is 24.

Look at the attached picture

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6 0

4 years ago

Read 2 more answers

Bryson has soccer practice for 2 1/4 hours 2 times a week. How much time does Bryson spend at soccer practice in 1 week?

sergey [27]

Answer:

4 1/2 hours

Step-by-step explanation:

1 practice = 2 1/4 hours

2 practices = 4 1/2 hours

6 0

3 years ago

Read 2 more answers

Answer question 11 and 12

Darya [45]

Answer:

11. y = -2x - 4.

12. y = x - 5

Step-by-step explanation:

11. the given points on the line are ((-2, 0) and (0, -4)

The slope of the line

= difference in y values / corresponding difference in x values

= ( - 4 - 0) / 0 - (-2))

= -4 / 2

= -2.

The general form of a straight line is y = mx + c where m = the slope and c = y value of the intercept on the y-axis.

So the equation is:

y = -2x - 4.

12.

The points are (1, -4) and (3, -2).

The slope is (-2 - (-4)) / (3 - 1)

= 2/2

= 1.

So the equation is

y = 1x + c

We find c by plugging in the point (1, -4):

-4 = 1 + c

c = -4 - 1

c = -5.

The equation is y = x - 5.

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3 years ago