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2 years ago

Can someone help me with this math homework please!

Mathematics

1 answer:

Delvig [45]2 years ago

3 0

Answer:

1. A -> k – 2 = 1/9(t – 18)

2. D -> Tim's with a y-intercept of $2,780

3. C -> y = x + 2

4. C -> y-8 = -0.2(x+10)

5. C -> $22.75

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2 years ago

Your parents will allow you to stream videos on your tablet if you agree to prepay the monthly bill.

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3 years ago

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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

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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) = $\sqrt{n\times p\times (1-p)}$

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

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2 years ago

Dylan makes 3 submarine sandwiches. He cuts each sandwich into sixths to share. He stacks all the sandwich pieces on a plate. Ho

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Answer:

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2 years ago

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Salid bought 35 feet of window trim at a hardware store the trim cost 1.75 pet foot including sales tax if salid paid 100.00 bil

skad [1K]

Answer: Salid should get $38.75 of change.

Step-by-step explanation:

Hi, to answer this question we have to analyze the information given:

Quantity of window trim bought: 35 feet
Cost per feet: $1.75
Amount paid: $100

First, we have to calculate the total cost, by multiplying the Quantity of window trim bought (35) by the price per feet (1.75)

35 x 1.75 = $61.75

Finally, to calculate the change that Salid should get, we have to subtract the total cost (61.75) to the amount paid (100)

100-61.75=$38.75

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