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Nezavi [6.7K]
3 years ago
6

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

nswers only please!!

Mathematics
2 answers:
ddd [48]3 years ago
6 0

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

Oksi-84 [34.3K]3 years ago
5 0
23.B
24.C
25.A
26.A

This would be your answers
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Which function has a range of y&lt;3?<br> y=3(2)<br> y=2(3)<br> O y=-(2)* +3<br> O y= (2)* - 3
VARVARA [1.3K]

option C is correct.

<u>Step-by-step explanation:</u>

If a function is defined as

f(x)=a^x where, a>0, then the range of the function is greater than 0.

a^x>0               .... (1)

Option A: Using inequity (1),

2^x>0

Multiply both side by 3.

3(2^x)>0

The range of first function is y>0. Therefore option A is incorrect.

Option B: Using inequity (1),

3^x>0

Multiply both side by 2.

2(3^x)>0

The range of second function is y>0. Therefore option B is incorrect.

Option C: Using inequity (1),

2^x>0

Multiply both side by -1.

-2^x

Add 3 on both the sides.

-2^x+3

y

The range of first function is y<3. Therefore option C is correct.

Option D: Using inequity (1),

2^x>0

Subtract 3 from both the sides.

2^x-3>-3

y>-3

The range of second function is y>-3. Therefore option D is incorrect.

7 0
3 years ago
5
nika2105 [10]

Answer:

idk

Step-by-step explanation:

8 0
3 years ago
URGENT HELP ME!! <br><br> please no links, thank you&lt;3
Illusion [34]

Answer:

x greater than or equal to 3

x greater than or equal to -8/3

Step-by-step explanation:

3 0
3 years ago
Pilar is playing with a motorized toy boat. She puts the boat in a lake and it travels 400m at a constant speed. On the way back
ankoles [38]

Answer:

The trip normally takes 8 minutes

Step-by-step explanation:

The given information states that the away distance the boat traveled = 400 m

The time traveled at the same initial  speed , v₁, by the boat on the way back = 2 minutes

The increase in speed of the boat by Pilar =  10 m/min

The new speed, v₂ = v₁ + 10

The time for the return trip, t₂ = 60 seconds (1 minute) faster than time for the trip, t₁

t₂ = t₁ - 1

Therefore we have;

v₁ × t₁ = v₁×2 + v₂×(t₂-2) = 400

v₁×2 + (v₁ + 10)×(t₂-2) = 400

(v₁ + 10)×t₂ - 20 = 400

But v₁ = 400/t₁ = 400/(t₂ + 1)

Which gives;

(400/(t₂ + 1) + 10)×t₂ - 20 = 400

10×(t₂²+ 36·t₂-2)/(t₂+1) = 400

10·t₂²+ 10·t₂-420 = 0

t₂²+ t₂-42 = 0

(t₂ - 7)(t₂ + 6) = 0

t₂ = 7 minutes or -6 minutes

Given that t₂ is a natural number, we have, t₂ = 7 minutes

Whereby, t₂ = t₁ - 1, we have;

7 =  t₁ - 1

t₁ = 1 + 7 = 8 Minutes

The trip normally takes 8 minutes

3 0
3 years ago
Please Help! Brainliest answer! Thank you
alexandr1967 [171]

Answer:

B

Step-by-step explanation:

8 0
3 years ago
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