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3 years ago

A bag contains 5 red marbles and 10 blue marbles. What is the probability of randomly selecting a red marble from the bag?

Mathematics

2 answers:

Ostrovityanka [42]3 years ago

4 0

Answer:

1/3

Step-by-step explanation:

5 red marbles + 10 blue marbles = 15 total marbles

5 red marbles / 15 total marbles = 5/15

5/15 = 1/3

olchik [2.2K]3 years ago

4 0

Answer:

$\frac{1}{3}$

Step-by-step explanation:

Total marbles = 5 + 10

= 15

There are 15 total marbles.

5 marbles are red.

$\frac{5}{15} =\frac{1}{3}$

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Find all the square roots of x2 ≡ 53 (mod 77)

Nikolay [14]

Answer:

$x=\pm\sqrt{77n+53}$

Step-by-step explanation:

We have been given an equivalence equation $x^2\equiv 53\text{ (mod } 77)$ . We are asked to find all the square root of the given equivalence equation.

Upon converting our given equivalence equation into an equation, we will get:

$x^2-53=77n$

Add 53 on both sides:

$x^2-53+53=77n+53$

$x^2=77n+53$

Take square root of both sides:

$x=\pm\sqrt{77n+53}$

Therefore, the square root for our given equation would be $x=\pm\sqrt{77n+53}$ .

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UNO [17]

Answer:

Step-by-step explanation:

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2|-9| - |-2|

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2 years ago

6. Describe a pattern shown in this sequence, and use the pattern to find the next two terms.

nlexa [21]

Answer:

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Step-by-step explanation:

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