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3 years ago

I forgot what range is...can someone plz help me , thank u

Mathematics

2 answers:

Sloan [31]3 years ago

8 0

Answer:

Range is the difference between the largest and smallest values.

Hope I helped again friend :)

disa [49]3 years ago

3 0

Answer:

Step-by-step explanation:

Range is finding the difference between the biggest number(3) and the smallest number(0). 3-0=3

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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

Solve the system of equations. y = 2x y = x 2 – 15

inn [45]

Answer:

D. (–3, –6) and (5, 10)

Step-by-step explanation:

The system has equations:

$y=2x$ ...(1)

and

$y=x^2-15$ ...(2)

Equate both equations;

$x^2-15=2x$

Rewrite in standard form:

$x^2-2x-15=0$

We factor to obtain:

$(x+3)(x-5)=0$

By the zero product principle;

$(x+3)=0,(x-5)=0$

$\implies x=-3,x=5$

When x=-3, y=2(-3)=-6

This yields the ordered pair (-3,-6).

When x=5, y=2(5)=10

This yields the ordered pair (5,10).

The correct choice is D.

8 0

3 years ago

Help please? Questions 1-15 i really need it♡

Novosadov [1.4K]

Answer:

here:

1. -9

2. -28

3. 54

4. -100

5. -60

6. -0

7. 49

8. -135

9. -96

10. 300

11. -153

12. -192

THIS TOOK LONG BECAUSE I DID A LONG ONE BUT THEN I MADE IT SHORTER. :D

7 0

3 years ago

Two coins have a radii of 3 cm and 1 cm the smaller coin rolls along the circumference of the fixed larger coin until the smalle

dezoksy [38]

I think you have to do 3cm/1cm

I think the small coin makes 3 revolution

6 0

4 years ago

How do the graphs of f (x) = x 2 and g (x)= 3/4 x 2? relate?

Agata [3.3K]

Answer:

$g(x)$ is a horizontal stretch of $f(x)$ by $\frac{3}{4}$ units.

Step-by-step explanation:

The given functions are;

$f(x)=x^2$

and

$g(x)=\frac{3}{4}x^2$

The parent function is $f(x)=x^2$ .

The function $g(x)=\frac{3}{4}x^2$ is a horizontal stretch of $f(x)=x^2$ by $\frac{3}{4}$ units.

8 0

4 years ago

Read 2 more answers