1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
RSB [31]
2 years ago
13

1.What must be used to tell if a collection of items is a set?

Mathematics
1 answer:
Mnenie [13.5K]2 years ago
3 0
1. A set is described either by listing all its elements between braces { } (the listing method), or by enclosing a rule within braces that determines the elements of the set (the rule method).
Example: So if P(x) is a statement about x, then S = { x | P ( x )} means “S is the set of all x such that P(x) is true.”

2. Types of set:
• Empty, or null, set {∅}.
• finite sets
• infinite set.

3. An infinite set: The set whose elements cannot be listed, i.e., set containing never-ending elements. Example: Set of all points in a plane.

4. The union of two given sets is the smallest set which contains all the elements of both the sets. To find the union of two given sets A and B is a set which consists of all the elements of A and all the elements of B such that no element is repeated. The symbol for denoting union of sets is ‘∪’.

The union of sets A and B, denoted by A ∪ B, is the set of elements formed by combining all the elements of A and all the elements of B into one set.
You might be interested in
What is 30/60 simplified and what do you multiply to get that?
maksim [4K]
1/2
Divide each number by 30
7 0
3 years ago
Can someone help me with number 3 please??!!
ipn [44]
There are 2 way to solve this.

one using Pythagoras theorem and 2nd using trigonometry

so lets solve it by both

using Pythagoras theorem we know

base^2 + perpendicular^2 = hypotanes^2

6^2 + x^2 = 12^2

36 + x^2 = 144

x^2 = 144- 36 = 108

x = √(108) = √( 2×2×3×3×3)

= (2×3) √ (3) = 6 √3

so answer is option 2

bow lets use trigonometry

we know
sin theta = perpendicular / hypotanes
sin 60 = x /12
x = 12 × sin 60
we kNow sin 60 = √3/ 2
so
x = 12×√3 /2 = 6√3
7 0
3 years ago
Factor 24m-12p+7224m−12p+7224 - 12p + 72 to identify the equivalent expressions.
lord [1]

Answer:

C, A

Step-by-step explanation:

If you would like me to explain, I could but this would be difficult. Trust me.

7 0
3 years ago
Read 2 more answers
Please Help Solve <br> 8 = 7/6 (b)
sukhopar [10]
B=48/7 you simplify 7/b(b) to 7b/6
Then multiply both sides by 6 so 8 x 6 =7b then simplify 8 x 6 =48
And divide both sides by 7 48\7 then switch sides b=48/7
4 0
3 years ago
You have 84 feet of streamers. You cut 24 pieces that are each 1/2 yard long. How many feet of streamers do you have left?
Aleonysh [2.5K]

Answer:

48

Step-by-step explanation:

4 0
3 years ago
Other questions:
  • A homeowner wants to enlarge a rectangular closet that has an area of (x2 + 9x + 20) ft?.
    7·2 answers
  • What is u^+6u-27 factoring
    11·1 answer
  • 4 x ½ what is the answer​
    15·1 answer
  • Pls help me i NEED THI WNP
    9·2 answers
  • Find the distance between each pair of points. Round your answer to the nearest tenth, if necessary.
    6·1 answer
  • The formula to convert temperature in Celsius to Fahrenheit is F= 9/5C+32. Solve for C<br> C= ?
    10·1 answer
  • PLZ HELP
    5·2 answers
  • The iPhone 6 costs $350 today. If it value depreciates at the rate of 30% per year when will it be
    14·1 answer
  • Zachary is solving the following equation.
    11·2 answers
  • Realiza tres ejemplos de probabilidad subjetiva
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!