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Aleks04 [339]
4 years ago
9

WILL GET BRAILIEST FOR CORRECT ANSWER

Mathematics
1 answer:
Alex Ar [27]4 years ago
5 0

Answer:

x = ± \sqrt{20}

Step-by-step explanation:

Given

x² = 20 ( take the square root of both sides )

x = ± \sqrt{20}

which can be simplified to

x = ± 2\sqrt{5}

[ ± means plus or minus ]

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You tell your 3 friends that you are going to a magic show. It turns out, in an amazing coincidence, they each
Inga [223]

Answer:

\frac{1}{4845} probability that you and your 3 friends will be selected.

Step-by-step explanation:

A probability is the number of desired outcomes divided by the number of total outcomes.

In this question, the order in which the volunteers are chosen is not important, which means that the combinations formula is used to solve this question.

Combinations formula:

C_{n,x} is the number of different combinations of x objects from a set of n elements, given by the following formula.

C_{n,x} = \frac{n!}{x!(n-x)!}

Desired outcomes:

You and the 3 friends(4 people), from a set of 4. So

D = C_{4,4} = \frac{4!}{4!0!} = 1

Total outcomes:

20 people from a set of 20. So

T = C_{20,4} = \frac{20!}{4!16!} = 4845

Probability:

p = \frac{D}{T} = \frac{1}{4845}

\frac{1}{4845} probability that you and your 3 friends will be selected.

8 0
3 years ago
Find the value of x *​
nasty-shy [4]

Answer: its 4 lol just look at the other side and you see the 4 there lol

Step-by-step explanation:

6 0
3 years ago
What is 33/84 in simplest form? And can you show the work?
yuradex [85]
33/84 in simplest form is 11/28 because you can divide top and bottom by three. Just show that you divided both numbers by three and then you will get 11/28. 
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3 years ago
What is a axis of symmetry
ella [17]
A line of symmetry<span> for a graph. The two sides of a graph on either side of the </span>axis of symmetry<span> look like mirror images of each other. Example: This is a graph of the parabola y = x</span>2<span> – 4x + 2 together with its </span>axis of symmetry<span> x = 2. The</span>axis of symmetry<span> is the red vertical line.

</span>

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