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3 years ago

What is the probability of at least one boy and at least one girl in a family of four kids?

Mathematics

1 answer:

Brums [2.3K]3 years ago

8 0

The probability is 50% or 2/4

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What is the coordinate of A after a reflection across the given line?

olga2289 [7]

Answer:

(-3, 3)

Step-by-step explanation:

The equation of line AB is

$y=-\frac{1}{3}x+2$

Since the y-intercept of the given line is (0,2), the line AB and the given line intersect at (0,2).

By definition, (0,2) is the midpoint of AA', where A' is the image of A after the reflection.

So, the coordinates of A' are (-3, 3)

6 0

1 year ago

Which of the following is a statistical question? a.Who is your favorite fantasy author? b.Do you like fantasy novels? c.What is

Dovator [93]

I would say B. or c. but most likely B to make sure you can search up examples of statistical questions.

7 0

3 years ago

How many significant figures are in the measurement 33050 kilograms

juin [17]

Answer:

there are four significant figures

Step-by-step explanation:

zeros to the right of a non zero digit are ambiguous

5 0

3 years ago

Factorise 9w² - 100<br><br><br>

ohaa [14]

Answer:

$9\, w^{2} - 100 = (3\, w - 10) \, (3\, w + 10)$ .

Step-by-step explanation:

Fact:

$\begin{aligned} & (a - b)\, (a + b)\\ =\; & a^{2} + a\, b - a\, b - b^{2} \\ =\; & a^{2} - b^{2} \end{aligned}$ .

In other words, $(a^{2} - b^{2})$ , the difference of two squares in the form $a^{2}$ and $b^{2}$ , could be factorized into $(a - b)\, (a + b)$ .

In this question, the expression $(9\, w^{2} - 100)$ is the difference between two terms: $9\, w^{2}$ and $100$ .

$9\, w^{2}$ is the square of $3\, w$ . That is: $(3\, w)^{2} = 9\, w^{2}$ .
On the other hand, $10^{2} = 100$ .

Hence:

$9\, w^{2} - 100 = (3\, w)^{2} - (10)^{2}$ .

Apply the fact that $a^{2} - b^{2} = (a - b) \, (a + b)$ to factorize this expression. (In this case, $a = 3\, w$ whereas $b = 10$ .)

$\begin{aligned}& 9\, w^{2} - 100 \\ =\; & (3\, w)^{2} - (10)^{2} \\ = \; & (3\, w - 10)\, (3\, w + 10)\end{aligned}$ .

8 0

2 years ago

If two angles form a linear pair, then they are adjacent and __________.

77julia77 [94]

The answer is C. Supplementary.

6 0

3 years ago

Read 2 more answers