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NikAS [45]
2 years ago
7

12 pleaseeeee help meeeee!

Mathematics
2 answers:
m_a_m_a [10]2 years ago
8 0
B because that person said b and i need points
Alex17521 [72]2 years ago
7 0

Answer:

b

Step-by-step explanation:

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Good afternoon help me 5 questions is 50 points and answer them all
Paraphin [41]
The first one  is the last answer because you subtract 18 and when you divide you change the inequality symbol 

the second one is the last answer for the same reason 

the 3rd one is x<-1.25

the 4th one is x<8/15
5 0
2 years ago
Solve for x<br> C. 120<br> 2x<br> 3x<br> D. (2x+6)<br> X<br> 126
brilliants [131]

Answer:

x=32

Step-by-step explanation:

i took the test

4 0
2 years ago
A train travels 220 miles in 4 hours. What is the train's speed in feet per minute?
Katena32 [7]
220 miles in 4 h = 55 mph multiply this by 5280 to get feet per hour then divide this by 60 to get ft/min


7 0
3 years ago
Read 2 more answers
An exit poll in an election is a survey taken of voters just after they have voted. One major use of exit polls has been so that
3241004551 [841]

Answer:

P(A) = 0.39

Step-by-step explanation:

We are given;

P(W|A) = 0.7

P(W|A^c ) = 0.3

We are told that 60% of the respondents said they voted for A. Thus;

P(A|W) = 60% = 0.6

Now, using the principle of drawing lots, we can be able to find the probability of the event that they are willing to participate in the exit poll which is P(W).

Thus;

P(W) = [P(W|A) × P(A)] +[P(W∣A^c) × P(A^c)]

Now, P(A^c) can be expressed as 1 - P(A)

Thus, we now have;

P(W) = [P(W|A) × P(A)] + [P(W∣A^c) × (1 - P(A)]

Plugging in the relevant values gives;

P(W) = 0.7P(A) + 0.3(1 - P(A))

P(W) = 0.7P(A) + 0.3 - 0.3P(A)

P(W) = 0.3 + 0.4P(A)

Now,using Baye's theorem, we can find an expression for P(A|W)

Thus;

P(A|W) = [P(A ∩ W)]/P(W)

This can be further expressed as;

P(A|W) = [P(A) × P(W|A)]/P(W)

Plugging in relevant values, we have;

0.6 = 0.7P(A)/(0.3 + 0.4P(A))

Cross multiply to get;

0.6(0.3 + 0.4P(A)) = 0.7P(A)

0.18 + 0.24P(A) = 0.7P(A)

0.18 = 0.7P(A) - 0.24P(A)

0.46P(A) = 0.18

P(A) = 0.18/0.46

P(A) = 0.39

7 0
3 years ago
Solve for X<br> 9x + 2 = 3<br> Give your answer as a fraction in its simplest form.
kati45 [8]

Answer:x=1/9

Step-by-step explanation:

1. subtract 2 from both sides

9x+2-2=3-2

2.simplify

9x=1

3.Divide both sides by 9

9x/9=1/9

4.simplify

x=1/9

4 0
2 years ago
Read 2 more answers
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