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jok3333 [9.3K]
2 years ago
7

(Science/math) please answer fast. read the problem below. please don't report if i got subject wrong

Mathematics
2 answers:
Otrada [13]2 years ago
6 0

Answer:

i think it is D

Step-by-step explanation

Hope that helps!

erastovalidia [21]2 years ago
4 0

Answer:

d

Step-by-step explanation:

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if you’re good with set theory diagrams and word problems for math 30 please help out with questions 23, 24, 25, and 26!! real a
ddd [48]

Answer:

23.Option B is correct

24. Option C is correct

25. Option A is correct

26. Option A is correct

Explanation:

23. The number of students participated in all three activities:

N= 30-(5+1+2+3+4+2+2) = 30-19=11

=> Option B is correct

24.

A. n(C⋂D⋂F)=2, not 8 (as shown in picture) => incorrect

B. n(D⋂F⋂C)=2, not 0 (as shown in picture) => incorrect

C. n(D⋂F⋂C)=2, => correct

D n(D⋂F⋂C)'= 7+6+1+9+5+12+0=40, not 7 => incorrect.

25.

According to the picture and the given data:

n(F⋂B)= 3

n(F⋂B) = ii = 3  

=> There is no error in ii (Option B is incorrect)

n(F) = 12

n(F) = i + ii = 12 + 3 = 15

=> error in i (ii is correct), i should be equal to n(F) - ii = 12 - 3 = 9

=> Option A is correct  ( (there is error in i)

n(B) = 7

n(B) = ii + iii = 3 + 4 = 7

=> no error in iii (Option C is incorrect)

n(F⋃B)' = n(F+B-(F⋂B))'=20-(12+7-3)=4

n(F⋃B)' = iv = 4

=> no error in iv (Option D is incorrect)

26.

B, (A⋂B⋂C) = {2}, not empty => incorrect

C, (A⋂B⋂C) = {3}, not empty => incorrect

D, (A⋂B⋂C) = {4, 3}, not empty => incorrect

=> Option A is correct

6 0
3 years ago
Read 2 more answers
7(5f-3n)-8 use n=3 and f=7​
Flauer [41]

Answer:

174

Step-by-step explanation:

plug all of the variables in first

7(5(f) - 3(n)) - 8

7(35 - 9) - 8

7(26) - 8

182 - 8

174

3 0
3 years ago
Read 2 more answers
The monthly salary of all adults in a certain US town is known to be right skewed with a mean of $3700. If a random sample of si
Alexxandr [17]

Answer:

The shape of the distribution of the sample mean would be bell-shaped(normally distributed).

Step-by-step explanation:

The Central Limit Theorem answers this question.

Central Limit Theorem

The Central Limit Theorem estabilishes that, for a random variable X, with mean \mu and standard deviation \sigma, a large sample size, of at least 30, can be approximated to a normal distribution with mean \mu and standard deviation \frac{\sigma}{\sqrt{n}}.

In this problem, we have that

The population distribution is right-skewed.

Sampling distribution of the sample mean with size 40.

The Central Limit Theorem estabilishes that the sampling distribution of the sample mean will be normally distributed, even if the distribution of the population is not.

So the shape of the distribution of the sample mean would be bell-shaped(normally distributed).

7 0
3 years ago
Simplify the algebraic expression:(x^5)^-2​
maksim [4K]

Answer:

1/x^10 should be the answer

5 0
3 years ago
Prove that angle ABD is congruent to angle CBE<br><br> with solution!
WINSTONCH [101]

ANSWER:

the conditions are the angle a is equal to angle c and ab = bc . Hence we need to prove that the triangles is congruent to the triangle cbe. ... angle A =angle C and AB=BC.

8 0
3 years ago
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