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3 years ago

5

Anyone know this? I need some help!

1 answer:

malfutka [58]3 years ago

6 0

6. AB||DC (Given)

AD||BC (Given)

AC=CA (Common side)

ABD~CDB.

Hence, Proved.

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The sum of a number and its additive inverse is equal to _____.

prohojiy [21]

The sum of a number and its additive inverse is equal to zero. The correct option among all the options that are given in the question is the second option or option "b". If we assume "x" to be a real number, then its additive inverse is "-x". On adding these two, we can see that the result comes to zero.

7 0

3 years ago

A chef bought 0.56 kilograms of almonds and 0.4 kilograms of pecans. How many kilograms of nuts did the chef buy in all?

Ivahew [28]

Answer:

0.96 kg

Step-by-step explanation:

0.56+0.40=0.96

5 0

3 years ago

Delicious77 [7]

The answer is 5

a^2+b^2=c^2
9+16=25
sq root of 25 is 5

4 0

3 years ago

Read 2 more answers

Graph this equation:<br> x - 2y = 6

Nady [450]

Answer:

The image below shows the equation x - 2y = 6 being graphed.

Hope this helps! :)

8 0

3 years ago

There is a bag filled with 3 blue and 4 red marbles.

tresset_1 [31]

Using the hypergeometric distribution, it is found that there is a 0.4286 = 42.86% probability of getting 2 of the same colour.

The marbles are chosen without replacement, hence the <em>hypergeometric </em>distribution is used to solve this question.

<h3>What is the hypergeometric distribution formula?</h3>

The formula is:

$P(X = x) = h(x,N,n,k) = \frac{C_{k,x}C_{N-k,n-x}}{C_{N,n}}$

$C_{n,x} = \frac{n!}{x!(n-x)!}$

The parameters are:

x is the number of successes.

N is the size of the population.

n is the size of the sample.

k is the total number of desired outcomes.

In this problem:

There is a total of 3 + 4 = 7 marbles, hence N = 7.

Of those, 3 are blue, hence k = 3.

2 marbles will be taken, hence n = 2.

The probability of getting 2 of the same colour is the sum of P(X = 0), which is both red, with P(X = 2), which is both blue, then:

$P(X = x) = h(x,N,n,k) = \frac{C_{k,x}C_{N-k,n-x}}{C_{N,n}}$

$P(X = 0) = h(0,7,2,3) = \frac{C_{3,0}C_{4,2}}{C_{7,2}} = 0.2857$

$P(X = 2) = h(2,7,2,3) = \frac{C_{3,2}C_{4,0}}{C_{7,2}} = 0.1429$

Hence:

$p = P(X = 0) + P(X = 2) = 0.2857 + 0.1429 = 0.4286$

0.4286 = 42.86% probability of getting 2 of the same colour.

You can learn more about the hypergeometric distribution at brainly.com/question/4818951

3 0

2 years ago