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3 years ago

Task 5

Mathematics

1 answer:

VMariaS [17]3 years ago

5 0

Why can’t you do all this work dog? yk? like it’s okay to learn

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Help me to solve this question

Anastasy [175]

Answer:

$\frac{6}{25}$

Step-by-step explanation:

$P(A) = \frac{number \: of \: times \: A \: occurs}{total \: number \: of \: spins}$

$P(A) = \frac{12}{12 + 16 + 13 + 9} = \frac{12}{50} = \frac{6}{25}$

4 0

3 years ago

Which inequality is false? A. 4 < 9 B. –6 < –3 C. –5 > –2 D. 12 > –7

CaHeK987 [17]

Simple...

which inequality is false?

A.) 4<9 (True)

B.) -6<-3 (True)

C.) -5>-2 (False)

D.) 12>-7 (True)

Thus, your answer.

4 0

3 years ago

Read 2 more answers

I will mark as brainiest

Margaret [11]

If two triangles are similar, then their side lengths are proportional.

RS / JK = RT / JL

5 / x = 4 / 7

4x = 35

x = 35/4 = 8.75

RT / JL = TS / LK

4 / 7 = 6 / (y + 2)

42 = 4(y + 2)

42 = 4y + 4

4y = 38

y = 38/4 = 9.5

LK = 9.5 + 2 = 11.5 cm

JK = x = 8.75

Hope this helps!

8 0

2 years ago

Suppose that a wall is constructed from concrete blocks where a block is a normal random variable with mean 11 kg and standard d

Artemon [7]

Answer:

The value for k is about k = 11.093kg.

Step-by-step explanation:

To answer this question, that is, P(x<k) = 0.85, we can use the standardized value for a raw score, or the formula for obtaining z-scores:

$\\ z = \frac{x - \mu}{\sigma}$ [1]

Where

$\\ x$ is the raw score.

$\\ \mu$ is the population mean.

$\\ \sigma$ is the population standard deviation.

In this case, we are asking to find a value x = k, so that 85% of the blocks have weights less than k (kg).

We have also to use the values for the cumulative standard normal distribution with $\\ \mu = 0$ and $\\ \sigma = 1$ to find the value of z that corresponds to a probability of 0.85.

First step: find the z that corresponds to the probability of 0.85.

To use the formula [1], as we previously mentioned, we first need to find the value of z that corresponds to a probability of 0.85 using the cumulative standard normal distribution table (available in any Statistics books or on the Internet). Then, for a cumulative probability of 0.85, the corresponding value for z = 1.03 (approximately).

Second step: solve the formula [1] for x.

Solving this formula for x, we have:

$\\ z = 1.03$