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3 years ago

Can someone tell me where to put both of the answer questions

Mathematics

2 answers:

Aleonysh [2.5K]3 years ago

7 0

number of tables- y

number of months-x

Monica [59]3 years ago

4 0

# of tables- y

# of months-x

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I need help with this

erik [133]

Answer:

Female: 11

Male: 16

Total:

(1) 34

(2) 25

(3) 100

Step-by-step explanation:

Female:

45 - 18 - 16 = 11

Male:

55 - 25 - 14 = 16

Total:

(1) 18 + 16

(2) 14 + 11 = 25

(3) 45 + 55 =

8 0

2 years ago

Read 2 more answers

Suppose in the University of Manitoba, 40% of the students live in apartments. If 600 students are randomly selected, then the a

just olya [345]

Answer:

$P(200\leq X\leq 400)=P(\frac{200-240}{12}\leq \frac{X-\mu}{\sigma}\leq \frac{400-240}{12})=P(-3.33\leq Z \leq 13.33)$

$=P(Z$

So then the correct answer would be:

B) .9996

Step-by-step explanation:

The exact way to solve this problem is using the binomial distribution, assuming that our random variable of interest is "number of students living in apartments" represented by X and $X \sim Bin(n=600, p =0.4)$

And we want this probability:

$P(200 \leq X \leq 400) [tex]In order to find this probability we can use the foloowing excel code:"=BINOM.DIST(400,600,0.4,TRUE)-BINOM.DIST(199,600,0.4,TRUE)"And we got:[tex] P(200 \leq X \leq 400) =0.999675[tex]But for this case the problem says that we need to approximate, so then we can use the normal approximation to the normal distribution. We need to check the conditions in order to use the normal approximation.
[tex]np=600*0.4=240\geq 10$

$n(1-p)=600*(1-0.4)=360 \geq 10$

So we see that we satisfy the conditions and then we can apply the approximation.

If we appply the approximation the new mean and standard deviation are:

$E(X)=np=600*0.4=240$

$\sigma=\sqrt{np(1-p)}=\sqrt{600*0.4(1-0.4)}=12$

And then $X \sim N (\mu = 240, \sigma= 12)$

And we are interested on the following probability:

$P(200\leq X\leq 400)=P(\frac{200-240}{12}\leq \frac{X-\mu}{\sigma}\leq \frac{400-240}{12})=P(-3.33\leq Z \leq 13.33)$

$=P(Z$

So then the correct answer would be:

B) .9996

6 0

3 years ago

Which equation can be simplified to find the inverse of y = 5x2 + 10?

zmey [24]

f^-1(x) = sq.rt 5(x - 10)/5, sq.rt 5(x - 10)/5 is the inverse of y = 5x^2 +10

Step-by-step explanation:

interchanging the variables

x = 5y^2 + 10

5y^2 +10 = x

5y^2 = x - 10

dividing by 5

5y^2/5 = x/5 + -10/5

y^2 = x/5 + - 10/5

y^2 = x/5 - 2

y = 5 (x-10) 0/5 (sq.rt)

g(5x^2 + 10) = 5x/5

g(5x^2 + 10) = x

f^-1(x) = sq.rt 5(x - 10)/5, sq.rt 5(x - 10)/5 is the inverse of y = 5x^2 +10

5 0

3 years ago

Read 2 more answers

Are the two triangles in the image above similar? If so then what is the correct postulate: SSS, SAS, or AA or None

viktelen [127]

the triangles are similar because of SSS

3 0

3 years ago

PLEASE HELP!!!!!!!!!!!!!!!

AysviL [449]

I would say it would be 55 and if this question.If you get the answer incorrect my apologies

Step-by-step explanation:

40 + y + y + 30 = 180

2y + 70 = 180

2y + 70 (-70) = 180 (-70)

2y = 180 - 70

2y = 1102y/2 = 110/2

y = 110/2

y = 55

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5 0

3 years ago