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3 years ago

What is the probability (draw a blue marble)?

Mathematics

2 answers:

bixtya [17]3 years ago

6 0

Answer:

3/12

Step-by-step explanation:

Theres 3 blue marbles and 12 total marbles (including all the colors).

Andreas93 [3]3 years ago

6 0

Answer: 1/3

Step-by-step explanation: In this problem, we're asked to find the probability of selecting a blue marble from a bag without looking.

Start with the ratio for the probability

of an event which is shown below.

P(event) = number of favorable outcomes/total number of outcomes

Since there are 3 blue marbles in a bag, the number of favorable outcomes is 3 and since there are 12 marbles in all and it's equally likely that we will choose any of the marbles, the total number of outcomes is 12 so we have 3/12.

Therefore, the probability of choosing a blue marble is 3/12.

However, notice that 3/12 can be reduced to 1/3.

So the final answer for the probability of choosing a blue marble is 1/3.

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Select the property of equality used to arrive at the conclusion if x-3=7 , then x=10

Fantom [35]

Answer:

The addition property of equality

Step-by-step explanation:

According to the addition property of equality, if we add the same number to each side of an equation, the equality is still true.

We are given the equation

x – 3 = 7, and we must solve for x.

We want to get x by itself, so we add 3 to each side.

x – 3 + 3 = 7 + 3

x = 10

We have just used the addition property of equality.

8 0

3 years ago

How much fabric is needed to make a tent in the shape of a triangular prism with the following measures?

marshall27 [118]

Answer:

C) 273 ft²

Step-by-step explanation:

7x11x3=231

2x1/2x7x6=42

231+42=273

3 0

3 years ago

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beks73 [17]

Answer:

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Step-by-step explanation:

6 0

3 years ago

Read 2 more answers

X - y = 2 4x – 3y = 11

swat32

Answer:

For x - y = 2

You need to find x or y in one of the equations and then substitute that into the other.

So we have;

x-y=2

4x-3y=11

We will take the first equation and find x;

x-y=2

add y to both sides;

x-y+y=2+y

x=2+y

Now we take that answer and substitute it forx in the other equation;

4(2+y)-3y=11

8+4y-3y=11

8+y=11

y=3

Now we have what y equals, so we use it in the first equation to find x;

x-3=2

x=5

So we have;

x=5; y=3

Hope you understand!

And for 4x – 3y = 11

Multiply the first equation by 2 and the second by 3 so that there are the same number of y's in each:

8x - 6y = 22 ...(3)

30x + 6y = -3 ...(4)

Now add (3) and (4) term by term:

38x + 0 = 19

38x = 19

or x = 1/2

Put this back into equation (1)

4*(1/2) - 3y = 11

2 - 3y = 11

Subtract 2 from both sides:

-3y = 9

Divide both sides by -3

y = -3

6 0

3 years ago

Read 2 more answers

Angle A and angle B are complementary angles of right triangle ABC, cos A = 0.83, and cos B = 0.55. What is sin A + sin B?

mezya [45]

Ya she's right it's C bc I had the same thing on my quiz and I got it right

6 0

3 years ago