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kenny6666 [7]
3 years ago
14

A brother and a sister are in the same math class. There are 8 boys and 10 girls in the class. One boy and one girl are randomly

chosen. What is the probability that the brother and sister are chosen? Write your answer as a fraction in simplest form.
Mathematics
2 answers:
lara31 [8.8K]3 years ago
8 0
Well, there are 8 boys and the brother is one of them so 1 is 12.5% of 8 and out of 10 girls, there 1 is the sister and 1 out of 10 is 10%. Now we multiply the percentages to get the answer 1/80
Dima020 [189]3 years ago
7 0

Answer:

1/18

Step-by-step explanation:

I think but I'm not sure

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Edward is collecting data on the average length of lizards from head to tail for a particular generation. Initially, the average
Zina [86]

Answer:

The general form of a natural logarithmic function is <em>f(x)=a In(x-h) +k.</em> Since the initial average length of the lizards was 20 centimeters, one possible point (h+1,k) through which the function passes is (0,20).

In this case, h= -1 since h +1 = 0 and k = 20.

It follows that x - h = (-1) = x + 1.

So, the function takes the form <em>f(x) = a In(x + 1) +20. </em>

The average length of the lizards after 2 years is 22.197. So f(2) =22.197. We substitute this value into the function

Step-by-step explanation:

<em>f(2) = a In(2 +1) +20 </em>

<em>22.197 = a In(3) + 20 </em>

<em></em>\frac{2.197}{1.099}<em>≈ a </em>

<em>2 ≈ a</em>

So the function that represents the average length of the lizards across this generation is <em>f(x) = 2 In(x+1) +20 </em>

3 0
3 years ago
Describe and correct the error in finding DC
sleet_krkn [62]

Answer:

DC = 2

Step-by-step explanation:

The wrong equation was used.

The right equation to use based on the midsegment theorem of a trapezoid is:

MN = ½(AB + DC)

MN = 8

AB = 14

Substitute

8 = ½(14 + DC)

Multiply both sides by 2

8*2 = ½(14 + DC)*2

2*8 = 14 + DC

16 = 14 + DC

16 - 14 = 14 + DC - 14

2 = DC

DC = 2

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3 years ago
Part A Divide. 6,499 - 7 =
Ksenya-84 [330]

Answer:0

Step-by-step explanation:

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7 0
1 year ago
Sally has 300 tangerines and and and 3%are Wayne's what percent does Sally have
marishachu [46]

Answer:

The answer is 97%

Step-by-step explanation:

To answer this problem you need to take the 300 tangerines, it in all that is the 100% so, now you need to take away the 3%, you are left with 97% (I hope i'm correct, sorry if i'm not)

5 0
2 years ago
ABC is a triangle. D is a point, vectors 2BD = 3DC<br> Prove vectors 2AB + 3AC = 5AD
MakcuM [25]

3Ac?????????????????

5 0
2 years ago
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