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3 years ago

11

During each week of piano lessons, Rachel learns to play 2 new pieces. Write an equation that shows the relationship between the

weeks of lessons x and the total number of pieces learned y.

1 answer:

jeyben [28]3 years ago

3 0

1X= 2P so that means UX•2P (U= the week)

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Brainest gets 100 do problem 1-12 show your work

In-s [12.5K]

1. Closed
2. IDK
3. No, because the first inequality says x is lesser than 5 but the second one says x is greater. X can't be both greater and lesser at the same time.
4. X>12
5. X $\leq -4$
6. y<-8
7. 2.3 + w>18
8. -4t $\leq -2/5$
9. b - 4.2 < -7.5
10. 2x $\leq -24$
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3 years ago

Classifying and ordering real numbers

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3 years ago

In an election, the population consists of the people who voted. Although there is overall data on how the population voted, the

andrew-mc [135]

Answer:

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

Step-by-step explanation:

braniest

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3 years ago

Pleaseee help with this! Giving 60 points!

Sonja [21]

Answer:

X = 2, -8

Step-by-step explanation:

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What is the solution set of the equation x^2 - 7x - 18 = 0

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(x-9)(x+2)=0
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