please i don't understand set theory in mathematics
please who will teach me through zoom
please indicate
will mark brainiest
Answers
Set theory is the mathematical theory of well-determined collections, called sets, of objects that are called members, or elements, of the set. ... The axioms of set theory imply the existence of a set-theoretic universe so rich that all mathematical objects can be construed as sets
For example, if A = {1, 2, 3} and B = {1, 2, 3, 4, 5} then A Í B (Í means is a subset of). If A = {1, 2, 4, 8}, then n(A) = 4. This is because n(A) means the number of members in set A. The universal set is the set of all sets.
Related Questions
please prove it for me
Answers
Answer:
see explanation
Step-by-step explanation:
Using the trigonometric identity
tanx = [tex]\frac{1}{cotx}[/tex]
Consider the left side
[tex]\frac{cotA-1}{cotA+1}[/tex] ← divide terms on numerator/denominator by cotA
= [tex]\frac{\frac{cotA}{cotA}-\frac{1}{cotA} }{\frac{cotA}{cotA}+\frac{1}{cotA} }[/tex]
= [tex]\frac{1-tanA}{1+tanA}[/tex]
= right side , thus proven
11
Dawson just ran 20 miles to prepare for a marathon. On his way home he stopped at Burger King and ordered 6
whoppers for $21. Write an equation to represent his order, then solve it.
Answers
Answer:
$21 / 6 burgers= price per burger
$3.50 per burger
Brainiest plz?
The perimeter of a triangle is 53 meters. Side a is three less than side b and side c is twice side b.
Answers
Answer:
a = 11
b = 14
c = 28
Step-by-step explanation:
a+b+c = 53
b-3 = a
c = 2b
substitute for a and c
(b-3)+b+(2b) = 53
reduce
4b-3 = 53
add 3 to each side
4b = 56
divide both sides by 4
b = 14
a = 14-2 = 11
c = 2(14) = 28
please help ASAP i will give brainliest.
Select all the points that are on the graph of the line 2x+4y=20.
A=(1,2)
B=(10,0)
C=(5,0)
D=(1,4)
E=(0,5)
F=(0,10)
Answers
Answer:
i am sure there is B and E
.
..
.
Answer:
(0,5) and (10,0)
Step-by-step explanation:
The equation of the straight line is given by 2x + 4y = 20 .......... (1)
Now, point (0,5) satisfies the equation (1) as putting x = 0, we will get y = 5.
Now, point (0,10) does not satisfy the equation (1) as putiing x = 0, we get y = 5 ≠ 10
Again, point (1,2) does not satisfy the equation (1) as putiing x = 1, we get y = 4.5 ≠ 2
Now, point (1,4) does not satisfy the equation (1) as putiing x = 1, we get y = 4.5 ≠ 4
Again, point (5,0) does not satisfy the equation (1) as putiing y = 0, we get x = 10 ≠ 5
Finally, point (10,0) satisfies the equation (1) as putiing y = 0, we get x = 10 .
Therefore, only points (0,5) and (10,0) are on the graph of the line 2x + 4y = 20 (Answer)
there you go have a wonderful day!
....................................
Answers
Answer:
c
Step-by-step explanation:
yes yes yes it's c :)))))))))
Plsss help me I’m trying to do this test
Answers
Answer:
(-3,2)
hope it helps.....
hundred and thous
d. 39)87 652
B
Answers
Dos personas halan de un cuerpo de 20Kg con fuerzas de 100N y 200N. calcular la aceleración de la masa si: A)las fuerzas se ejercen horizontalmente en el mismo sentido. B)las fuerzas actúan horizontalmente en sentido contrario. c)en que sentido deben actuar las fuerzas para que la aceleración sea máxima y mínima.
Answers
Answer:efbiuasnfl
Step-by-step explanation:
8) Stephanie is a telemarketer and has made 32 calls in 3 hours. If she keeps up this pace, about how many calls will she make in 5.5 hours?
What does this equal??????
Answers
Answer:
58.6667
Step-by-step explanation:
32 calls/ 3 hours = 10.6667 calls/hour
10.6667 calls/hour x 5.5 hours = 58.6667, or 58 2/3 calls in 5.5 hours
Based on the information below, what are the values of x and y of the solution to the system of equations used to
create the information?
4
-6
14-
AL-
4
38 -6
Axl-
26 -2
38
8 -2
8 26
Answers
16a+5y=17 solve for y
Answers
In the graph y = the square root of x
When x = 2
y =
(Round to the thousandths place [3 decimal places])
Answers
Answer:
0.001
Step-by-step explanation:
how to solve 1.6 ×0.215
Answers
Answer:
35.344
Step-by-step explanation:
Coco's garden has 8 tomato plants, 4 pepper plants, 3 squash plants, and 6 pumpkin plants. For every 7 plants in Coco's garden, there are 2 ___ plants.
Choose 1 answer:
Choice (A)
Tomato
Choice (B)
Pepper
Choice (C)
Squash
Choice (D)
Pumpkin
Answers
Step-by-step explanation:
You can narrow it down to A, B, and D. Im sorry, but thats all I can help you with
A above ground garden is rectangular and has a length of 15 feet and a height of 2 feet. It will hold 375 cubic feet of soil. What is the height of the above ground garden?
Answers
Answer: [tex]12.5\ ft[/tex]
Step-by-step explanation:
Given
Length L=15 feet
width b=2 feet
Volume V=375 cubic feet
Suppose h is the height
Volume is given by [tex]V=l\times b\times h[/tex]
[tex]\Rightarrow 375=15\times 2\times h\\\Rightarrow h=\frac{375}{30}=12.5\ ft[/tex]
Pls guys help me !!! I will mark you as brain lies.
You are selling candy bars. It cost $140 for
a startup fee and $1.50 per candy bar. Your
income is based on the fact that you are
selling the candy bars for $4.00 each.
1) What is the profit from selling 40 candy bars? The profit is $ ........
2) What is the profit selling 100 candy bars? The profit is $ .......
3) In order to break even you must sell .......... candy bars.
4) The minimum of candy bars you must sell in order to start making positive profit is .......... candy bars.
Answers
Answer:
Profit = price charged - cost of goods
$10 = Price - 30.00
$40 = Price of one box
So, they have to charge $40 per box. Since there are 50 bars in each box, the price per bar has to be:
$40.00/50 bars = $0.80 per bar
You can check this....
0.80 x 50 bars = $40.00 <<< this is the total income from the sale of one box.
since each box costs $30.00, they've made $10.00 on each box.
Step-by-step explanation:
Answer:
1) 160 2) 400 3) 35 4) 36
Step-by-step explanation:
8, 12, 16,...
Find the 31st term.
Answers
Hope I helped. :)
- Valenteer
Hope this helped:)
8w + 6 - 7 - 4w? i dont understandx
Answers
Answer:
simplified expression = 4w-1
Step-by-step explanation:
2/5 (j +40) = - 4
j=?
Answers
Answer: j = -50
Step-by-step explanation:
2/5 (j + 40) = -4
=> 2/5j + 16 = -4
=> 2/5j = - 20
=> j = -50
Rafael and his sister bought snacks for movie night.
Rafael got 3 boxed candies and 1 bag of chips for $6.99.
His sister got 2 bags of chips and 1 boxed candy for $5.98.
Find the cost for 1 of each of these items in dollars.
One boxed candy costs $ ?
and one bag of chips costs $?
Answers
Answer:
Each boxed candies are 5.98, and Each bag of chips are 6.99 Sorry if incorrect
Answer:
bag of chips is 2.19
boxed candy is 1.60
Step-by-step explanation:
Desmos Calculator
Given the equation 8(2x+5)=3x + 4x:
a.Find the solution for x.
b. Write a step-by-step procedure for how to do a problem that is the same as this one.
Answers
Answer:
the answer is x= -40/9
Step-by-step explanation:
8(2x+5)=3x+4x
16x+40=3x+4x
16x+40=7x
16x=7x-40
16x-7x=40
9x=-40
x= -40/9
Answer: x=-40/9
Step-by-step explanation: 1. Distribute:16x+40=3x+4x
2.Combine like terms:16x+40=7x
3.Subtract40from both sides of the equation:16x+40-40=7x-40
4.Simplify1 6x=7x-40
5.Subtract7x from both sides of the equation:1 6x-7x=7x-40-7x
6.Solution:x=-40/9
Helpppppppppp pleaseeeeeeee
Answers
Answer:
24
Step-by-step explanation:
AB = 12
that means BC = 12
Add 2 parts together you get 24
Answer:
AB=12
BC=12
AC=24
i hope that i help you
2.51, 2 2/5, 2.25, 2 7/8 in an ascending order
Answers
Step-by-step explanation:
2.875,2.51,2.25,2.4 pls follow mark as brainliest
PQ=RQ what does b =
Answers
................b = 17...............
Expand and simplify
A. (x – 2y)(y – 3x)
B. (2p+3)(p^2-4p-7)
Answers
Answer:
A. (x−2y)(y−3x)
=(x+−2y)(y+−3x)
=(x)(y)+(x)(−3x)+(−2y)(y)+(−2y)(−3x)
=xy−3x2−2y2+6xy
=−3x2+7xy−2y2
B. (2p+3)(p2−4p−7)
=(2p+3)(p2+−4p+−7)
=(2p)(p2)+(2p)(−4p)+(2p)(−7)+(3)(p2)+(3)(−4p)+(3)(−7)
=2p3−8p2−14p+3p2−12p−21
=2p3−5p2−26p−21
Hope it helps
Please mark me as the brainliest
Thank you
determine the constant rate of change beetween x and y in the table
Answers
Answer:Theres no table please edit and put a table.
PLEASE HELP, MARKING BRAINLIEST!!!!
What is the value of x??
Answers
Answer:
10
Step-by-step explanation:
Explanation is....
What is the GCF of 15x^2y and 45xy
Answers
Answer:
15xy
Step-by-step explanation:
Answer:
15xy
Step-by-step explanation:
15xy is the highest factor of both 15x^2y and 45xy.
It would look something like 15xy (x + 3y).
Hope this helped!
What is the measure of Zy? Hint: Zo is a right angle.
Answers
Answer:
40
Step-by-step explanation:
If angle x is a right angle, meaning 90 degrees, and the right angle is dissected into two angles with one of them being 50 degrees that leaves 40 degrees left to complete the 90 degree right angle
Becky needs to put 4 cups of flour into her bread maker to make one loaf of bread. She is using a measuring cup that holds 13 cup of flour. How many 13 cups of flour will she need to make a loaf of bread?
Answers
Answer:
12
Step-by-step explanation:
From the above question, we ate told that:
Becky needs to put 4 cups of flour into her bread maker to make one loaf of bread.
The size of her measuring cup = 1/3 cup
The number of 1/3 cups of flour she will need to make a loaf of bread is calculated as:
4 cups of flour ÷ 1/3 cup of flour
= 4 cups of flour × 3/1 cup of flour
= 12