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Vesna [10]
3 years ago
15

Brainlist Please help me

Mathematics
1 answer:
creativ13 [48]3 years ago
3 0

Answer:

Yes she made an error. Explanation is below.

Step-by-step explanation:

Let the sample space for a six sided number cube be S

n(S) = \{1,2,3,4,5,6\}\\n(S) = 6

Let the event of a number getting greater than two be B

n(B) = \{3,4,5,6\}\\n(B) = 4

To find:

the probability of complement of B that is

p(~B) = ?

Solution"

First we need to solve probability for number getting greater than two

p(B) = \frac{n(B)}{n(S)}

Now substituting the values we get

p(B) = \frac{4}{6}

p(B) = \frac{2}{3}

but we need complement of B so

p(\textrm{complement of B)} = 1 - p(B)\\p(\~B) = 1 - p(B)\\p(\~B) = 1 - \frac{2}{3}\\ =\frac{1}{3} \\

P(complement of rolling a number greater than two) = \frac{1}{3}

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2w^2-11w=-12 <br> a w=3/2 or 4<br> b w=1 or 12<br> c w=1 or 7<br> d w = 2.5 or 6
dlinn [17]
Hey mate !!
Here's your answer !!


2w^2 - 11w = -12
2w^2 -11w + 12 = 0
2w^2 - 8w - 3w + 12 = 0

2w ( w - 4) -3 ( w - 4) = 0
(2w - 3) ( w - 4) = 0

Hence

2w - 3 = 0
2w = 3
w = 3/2

w - 4 = 0
w = 4

Hence value of w are 4 and 3/2

Hope this helps!!
Cheers!!
7 0
3 years ago
There are 18 red and 20 blue marbles in a jar. Write the simplified ratio of blue to red marbles in 3 different ways
AnnZ [28]

20 to 18

20:18

20/ 18

Step-by-step explanation:

Ratios can be writen in 3 different formats. You can write your ratios in fraction form (Example- 20/18), colan form, (Example- 20:18) and finaly word form (Example- 20 to 18). Hope this was acurate and helpful. Have a magical rest of your day!

3 0
3 years ago
Read 2 more answers
I need accurate answer please because this is the last attempt
matrenka [14]

Answer:

I'm not very sure, however I think you have to replace the sign - for a +.

Step-by-step explanation:

7 + 4√13

3 0
3 years ago
The base of a 15-foot ladder is 6 feet from a building. If the ladder reaches the flat roof, how tall is the building?
Vlad [161]

Answer:

the answer would be 13.75 feet

Step-by-step explanation:

The computation of the tall is the building as follows:

Given that

Base is 6 foot

And, the hypotheses is 15 feet

Here we use the Pythagoras theorem

= √15^2 - √6^2

= √225 - √36

= √189

= 13.75 feet

Hence the answer would be 13.75 feet

6 0
3 years ago
The area of a triangle is defined by the formula: A = 1/2 b h. Find a function for the area of a triangle in terms of its height
chubhunter [2.5K]

Answer:

h = (2A)/b

Step-by-step explanation:

4 0
2 years ago
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