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PolarNik [594]
3 years ago
15

Find the number of subset and number of proper subset from A=(5,6,7,8)

Mathematics
1 answer:
dezoksy [38]3 years ago
3 0

Step-by-step explanation:

The number of subsets=2ⁿ where n=4 members

2ⁿ=2⁴=16

Number of proper subsets=2ⁿ-1

16-1=15

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Galen sold tickets for his church’s carnival for a total of $2,820. Children’s tickets cost $3 each and adult tickets cost $5 ea
Veronika [31]

Answer:

a = 195 ; c = 615

Step-by-step explanation:

So, you want to start by forming your equations...

I will use 'c' for children and 'a' for adults for my variables

3a + 30 = c  

(this is because of the info that 30 more tickets than 3 times the amount of children's were sold than adult)

then for equation 2:

3c + 5a = 2820

(this is because of the prices of the tickets and the total money raised)

Then, plug in the equation for c

Your equation should look like:

3(3a + 30) + 5a = 2820

You get:

(9a +90) + 5a = 2820

Then:

14a = 2730

So:

a = 195 adult tickets sold

Plug in a, to find c:

3 (195) + 30 = c

585 + 30 = c

c = 615 children tickets sold

4 0
3 years ago
Yuki works at a garden store. She is stacking 40-pound bags of soil. Use the equation w=40b to find the total weight, w, of 5 ba
NeTakaya

Answer:

w= 40b

w=40× 5

w=200

......

4 0
3 years ago
Please help, trigonometry is hard for me
Vsevolod [243]

Because the cos theta < 0 then theta must be an obtuse angle

so a^2 + b^2 < a^2

C

6 0
3 years ago
Is 5 rational or irrational?
kaheart [24]

Answer:

That would be rational

Step-by-step explanation: If you want to break it down it would be because when I look back to middle school Rational were not  even to their numerator and denominator but not sure how that applies if you have 5/5 but your answer is rational  hopes this helps.

6 0
3 years ago
An isosceles triangle has two sides of equal length, a, and a base, b. The perimeter of the triangle is 15.7 inches, so the equa
wolverine [178]

Answer:


Step-by-step explanation:

It is given that an isosceles triangle has two sides of length a and base b, then the perimeter of an isosceles triangle= Sum of all the sides

⇒a+a+b=15.7

⇒2a+b=15.7

⇒b=15.7-2a

Also, we know that he sum of the lengths of any two sides of a triangle must be greater than the length of the third side that means,

⇒a+a>b

⇒2a>b

Now, substituting the value of b in the above equation, we get

2a>15.7-2a

⇒4a>15.7

⇒a>3.925

Now, b=15.7-2a, therefore b=15.7-2(3.925)=15.7-7.85=7.85

Thus possible value of b is 7.85.

8 0
3 years ago
Read 2 more answers
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