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Oksi-84 [34.3K]
3 years ago
11

Let the sample space represent all the values from 1 to 10. Let A = {1, 2, 8} and B = {2, 7}. What is the P ( A ∪ B ) ? (Express

your answer as a decimal)
Mathematics
1 answer:
Aneli [31]3 years ago
5 0

Let A = {1, 2, 8} and B = {2, 7}.

P ( A ∪ B ) = {1, 2, 7, 8}

= 4/10

= 0.4

Answer: 0.4

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Brainliest please help! :C
Nikitich [7]

Answer: 21

Step-by-step explanation:

N-\left(2\cdot \:7\right)=7

\mathrm{Remove\:parentheses}:\quad \left(a\right)=a

N-2\cdot \:7=7

\mathrm{Multiply\:the\:numbers:}\:2\cdot \:7=14

N-14=7

\mathrm{Add\:}14\mathrm{\:to\:both\:sides}

N-14+14=7+14

\mathrm{Simplify}

N=21

8 0
2 years ago
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What is [−7,−5)∩[−5,0]?
taurus [48]

Answer:

[−7,−5)∩[−5,0] = [-5]

Step-by-step explanation:

A = A1 ∩ A2 means that A contains the intersected elements (shared elements) of A1 and A2

6 0
3 years ago
REWARD: 50 points + Brainly to the best answer.<br> Check the file.
Debora [2.8K]

Answer:

a) No because the gallons and quarts of oil you and your friend bought is proportional.

b) Yes because the gallons and quarts of oil are no longer proportional.

c) 1 gallon of gasoline = $3.55

   1 quart of oil = $5.00

Step-by-step explanation:

Let g = cost per gallon of gasoline

Let q = cost per quart of oil

a)  Creating expressions from the given information:

10g + 2q = 45.50

5g + q = 22.75

From inspection, we can see that if we multiply the second equation by 2, it will give us the first equation.  Therefore, they are proportional and we cannot determine the variables.

b) Creating expressions from the given information:

10g + 2q = 45.50

5g + q = 22.75

8g + 2q = 38.40

From inspection, we can see that the third equation is not proportional to equations 1 and 2.  Therefore, we can use this equation with either of the other equations to determine the variables.

c)

Using equations 2 and 3 from the previous part (b):

5g + q = 22.75

8g + 2q = 38.40

Rewrite 5g + q = 22.75 to make q the subject:

⇒ q = 22.75 - 5g

Substitute into 8g + 2q = 38.40 and solve for g:

⇒ 8g + 2(22.75 - 5g) = 38.40

⇒ 8g + 45.5 - 10g = 38.40

⇒ 2g = 7.1

⇒ g = 3.55

Substitute found value for g into q = 22.75 - 5g and solve for q:

⇒ q = 22.75 - (5 x 3.55)

⇒ q = 5

3 0
2 years ago
Solve for x. -5 + 5x = -(1 - 6x)
choli [55]

- 5 + 5x = - 1 + 6x

- 5 + 5 + 5x = - 1 + 5 + 6x

5x = 4 + 6x

5x - 6x = 6x - 6x + 4

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x = - 4

4 0
2 years ago
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Factor out the coefficient of the variable 5/6s+4/6
nirvana33 [79]
Okie, we find out the coefficient
5/6 s+ 4/6= 1/6 x 5s+ 1/6 x 4= 1/6(5s+4)

we have done this
Have a good day
5 0
3 years ago
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