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gulaghasi [49]
3 years ago
7

A bag held 4 black marbles, 2 red marbles, and 6 white marbles. I drew a black marble and did not replace it. What is the probab

ility of drawing a black marble next?
Mathematics
1 answer:
Helga [31]3 years ago
6 0

Answer:

P (black marble) =3/11

Step-by-step explanation:

We need to find the total number of marbles

4 black marbles+ 2 red marbles+ 6 white marbles= 12 marbles

We take away a black marble and throw it away

3 black marbles+ 2 red marbles+ 6 white marbles= 11 marbles

The probability of drawing a black marble is

P (black marble) = black/total

                           =3/11

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Two angles are complementary.The larger angle is 30 degrees more than 4 times the smaller
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Answer:

Step-by-step explanation:

Remark

2 angles are complementary means that 2 angles add up to 90°. That is the guiding princeple behind the problem.

Givens

Let the smallest angle = x

Let the largest angle = 4x + 30

Equation

4x + 30° + x = 90°                   Combine like terms on the left

Solution

5x + 30 = 90                            Subtract 30 from both sides.

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Answer

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Answer:

A.

Step-by-step explanation:

Anwer A has the following equation:

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