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laiz [17]
3 years ago
8

What does it mean when there are variables on top of each other in parentheses in statistics?

Mathematics
1 answer:
Ilya [14]3 years ago
4 0
It's a combination:
\left(  {{n} \atop {k}}\right)\equiv C(n,k)=\dfrac{n!}{(n-k)!k!}
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Evaluate 3(x-1)^2 if x=4
Ronch [10]

Answer:

27

Step-by-step explanation:

3(4-1)²

3(3)²

3 x 9

= 27

5 0
3 years ago
A manufacturer is designing a flashlight. For the flashlight to emit a focused beam, the bulb needs to be on the central axis of
aalyn [17]
From the problem, the vertex = (0, 0) and the focus = (0, 3)
From the attached graphic, the equation can be expressed as:
(x -h)^2 = 4p (y -k)
where (h, k) are the (x, y) values of the vertex (0, 0)
The "p" value is the difference between the "y" value of the focus and the "y" value of the vertex.
p = 3 -0
p = 3
So, we form the equation
(x -0)^2 = 4 * 3 (y -0)
x^2 = 12y
To put this in proper quadratic equation form, we divide both sides by 12
y = x^2 / 12

Source:
http://www.1728.org/quadr4.htm




5 0
3 years ago
Four students are competing in a spelling bee. The top three students will receive a medal. How many different ways can they fin
Gre4nikov [31]

Answer:

<em>How many different ways can the letters of the word MATH be rearranged to form a four- ... 4 · 3 · 2 · 1 = 24 ways to spell a code worth with the letters MATH. ... example, coming in first means that you get the gold medal instead of the ... A group of four students is to be chosen from a 35-member class to represent the class.</em>

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
Please help I’ll give brainliest
Shtirlitz [24]

Answer:

15

Step-by-step explanation:

15 cubed (15×15×15) equals 3375

8 0
3 years ago
what percentage of people choose baseball or soccer as their favorite sport there is a circle 25% play basketball 35% play footb
erma4kov [3.2K]

Answer:

  35% chose baseball or soccer

Step-by-step explanation:

  baseball or soccer = 20% + 15% = 35%

_____

The categories add to 100%, so are mutually exclusive, as you expect when they are "favorite sport" categories. Hence the union of two of them will be their sum. (Otherwise, you'd have to subtract the amount by which the categories overlap.)

3 0
3 years ago
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