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3 years ago

Q # 20 please help to solve

Mathematics

1 answer:

spin [16.1K]3 years ago

8 0

If submarine is at the surface (the initial position) and then dives 375 ft, the coordinate of submarine becomes -375 ft relatively to the initial position. When the submarine dives another 175 ft down, the coordinate of submarine becomes -375-175=-550 ft relatively to the initial position.

Answer: Correct choice is A.

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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

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3 years ago

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andriy [413]

Answer:

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Step-by-step explanation:

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Vladimir79 [104]

Answer:

1 and 2) After multiplying (x+y+3)(y+1) we have

xy+x+y^2+4y+3

Which is an equivalent expression after applying the distributive property.

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3 years ago

Is 10 a perfect square? Is 100 perfect square? Explain

Setler [38]

10 is not a perfect square however 100 is. This is because a square is defined as numbers that are the product of another whole number when multiplied by itself. So, 10x10=100, making 100 a perfect square. However, no number multiplied by itself equals 10, meaning 10 is NOT a perfect square.

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Help me get this: Y=3x+C

Sedbober [7]

Hi there!

$Y = 3x + c$

Simplifying

$Y = 3x + c$

Reorder the terms:

$Y = c + 3x$

Solving

$Y = c + 3x$

Solving for variable 'Y'.

Move all terms containing Y to the left, all other terms to the right.

Simplifying

$Y = c + 3x$

Hope this helped you!

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