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3 years ago

What line model matches the expression

Mathematics

1 answer:

SVETLANKA909090 [29]3 years ago

3 0

Answer:

Step-by-step explanation:

You would distribute the negative sign in front of -3. -3 would then become 3.

-6 (3)

Then you would place them on a line.

Please mark as brainliest! If you need anymore help just let me know! :D

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Assume that different groups of couples use the XSORT method of gender selection and each couple gives birth to one baby. The XS

olganol [36]

Answer:

Mean and Standard deviation for the numbers of girls in groups of 36 births are 18 and 3 respectively.

Step-by-step explanation:

We are given that he X SORT method is designed to increase the likelihood that a baby will be a girl, but assume that the method has no effect, so the probability of a girl is 0.5.

Now consider a group consisting of 36 couples.

The above situation can be represented through binomial distribution;

$P(X=r)=\binom{n}{r} \times p^{r} \times (1-p)^{n-r} ;x=0,1,2,3,.....$

where, n = number of trials (samples) taken = 36 couples

r = number of success

p = probability of success which in our question is probability

of a girl, i.e.; p = 0.5

Let X = Numbers of girls in groups of 36 births

So, X ~ Binom(n = 36, p = 0.5)

Now, mean for the numbers of girls in groups of 36 births is given by;

Mean, E(X) = $n \times p$ = $36 \times 0.5$ = 18

Also, standard deviation for the numbers of girls in groups of 36 births is given by;

Standard deviation, S.D.(X) = $\sqrt{n\times p\times (1-p)}$

= $\sqrt{36\times 0.5\times (1-0.5)}$

= 3

3 0

3 years ago

Find the vertices of the hyperbola. Enter the smallest coordinate first.

melisa1 [442]

Answer:

([-3], [0]), ([3], [0])

Step-by-step explanation:

The given equation of the hyperbola is presented as follows;

$\dfrac{x^2}{9} - \dfrac{y^2}{49} = 1$

The vertices of an hyperbola (of the form) $\dfrac{x^2}{a^2} - \dfrac{y^2}{b^2} = 1$ are (± a, 0)

The given hyperbola can we presented in a similar form as follows;

$\dfrac{x^2}{9} - \dfrac{y^2}{49} = \dfrac{x^2}{3^2} - \dfrac{y^2}{7^2} = 1$

Therefore, by comparison, the vertices of the parabola are (± 3, 0), which gives;

The vertices of the parabola are ([-3], [0]), ([3], [0]).

4 0

3 years ago

Given h(x)=-x+2, find h(2)

Bingel [31]

Answer:

Step-by-step explanation:

Replace x with 2.

-(2)+2=0

6 0

2 years ago

Read 2 more answers

June bought 3 1 2 312 gallons of white paint at $17.50 per gallon and 1 3 4 134 gallons of blue paint at $19.00 per gallo

algol [13]

312* 17.5= 5460.00

134*19=2546

2546+5460= $8,006.00

5 0

3 years ago

Find an ordered pair (x y) that is a solution to the equation calculator

galina1969 [7]

Pick a value for 'x' then solve for the 'y'

Ex: X=6 then 6-2y=2 then 4=2y then y=2y

So your answer will be 6,2.

Another answer to your question would be 4,1.

7 0

3 years ago