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2 years ago

Which description is correct for the x-intercept(s) of Function A and Function B?

Mathematics

2 answers:

Rzqust [24]2 years ago

7 0

Answer:

Not b its "its each function has two x-intercepts

Step-by-step explanation:

i took the quiz and yeahhh

Alenkasestr [34]2 years ago

3 0

Answer:

Step-by-step explanation:

idk

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A certain standardized test's math scores have a bell-shaped distribution with a mean of 530 and a standard deviation of 119. Co

kumpel [21]

Answer:

a) 68.2%

b) 31.8%

c) 2.3%

Step-by-step explanation:

We are given the following information in the question:

Mean, μ = 530

Standard Deviation, σ = 119

We are given that the distribution of math scores is a bell shaped distribution that is a normal distribution.

Formula:

$z_{score} = \displaystyle\frac{x-\mu}{\sigma}$

a) P(test scores is between 411 and 649)

$P(411 \leq x \leq 649)\\\\= P(\displaystyle\frac{411 - 530}{119} \leq z \leq \displaystyle\frac{649-530}{119})\\\\= P(-1 \leq z \leq 1)\\\\= P(z \leq 1) - P(z < -1)\\= 0.841 - 0.159 = 0.682 = 68.2\%$

b) P(scores is less than 411 or greater than 649)

$P(x < 411 < x, x > 649)\\=1 = P(411 \leq x \leq 649)\\=1 - 0.682\\=0.318 = 31.8\%$

c) P(score greater than 768)

P(x > 768)

$P( x > 768) = P( z > \displaystyle\frac{768 - 530}{119}) = P(z > 2)$

$= 1 - P(z \leq 2)$

Calculation the value from standard normal z table, we have,

$P(x > 768) = 1 -0.977 = 0.023 = 2.3\%$

5 0

3 years ago

What is the percent of change from 35 to 62? round to the nearest percent.

Leona [35]

In order to change from 35 to 62, we have to add 27. So, the question becomes: which percentage of 35 is 27?

To answer this question, we set this simple equation

$27 = 35\cdot\dfrac{x}{100}$

And solving for x we have

$x = \dfrac{2700}{35} \approx 77.14$

So, if you change from 35 to 62, you have an increase of about 77%

7 0

2 years ago

How do i write 658.129 in expanded form?

Orlov [11]

Six hundred fifty eight and one hundred twenty nine thousandths

5 0

2 years ago

Read 2 more answers

HELP ASAP PLZ!!!!!!!!!!!!!! THANKS IN ADVANCED :)

taurus [48]

I think its the 30x + 20

4 0

3 years ago

Help pleaseeeeeeeeeeeeeee

vitfil [10]

Answer:

C.30

Step-by-step explanation:

Its a pattern that increases by $5 as it goes down.

4 0

2 years ago