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Levart [38]
4 years ago
13

30 points to anyone that can answer correctly in probability.

Mathematics
2 answers:
gregori [183]4 years ago
7 0

Formula: P(A or B)=P(A)+P(B)-P(A or B)  


p(c)=7/18


p(s)=6/18


p(c or s)=2/18


0.39+0.33-0.11=


answer:0.61

IrinaVladis [17]4 years ago
4 0

Formula: P(A or B)=P(A)+P(B)-P(A or B)  

p(c)=7/18

p(s)=6/18

p(c or s)=2/18

0.39+0.33-0.11=

answer:0.61

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Ira Lisetskai [31]
I believe th answer is irrational
6 0
3 years ago
Solve x2 + 14x = −24 by completing the square.
Aleks04 [339]

Option A

The solution set of the equation is {-12, -2}

<h3><u>Solution:</u></h3>

Given equation is:

x^2 + 14x = -24

We have to find the solution set of this equation by completing the square

First, rearrange the equation so that only zero will be on the right side:

x^2 + 14x + 24 = 0 ----- eqn 1

<em><u>The general form of quadratic equation is:</u></em>

ax^2 + bx + c = 0 where a \neq 0

On comparing the given eqn 1 with general quadratic equation, we get

a = 1

b = 14

c = 24

In completing the square, we take half of coefficient of middle term "x" and then square it. Then we add it on both sides of the equation

So to complete the square, add (\frac{b}{2})^2 to both sides of the equation

x^2 + 14x + 24 + (\frac{14}{2})^2 = (\frac{14}{2})^2

x^2 + 14x + 24 + 7^2 = 7^2\\\\x^2 + 14x + 24 + 49 = 49

x^2 + 14x + 24 + 49 = 49\\\\x^2 + 14x + 49 = 49 - 24\\\\x^2 + 14x + 49 = 25\\\\(x + 7)(x + 7) = 25\\\\(x + 7)^2 = 25

Take square root on both sides

x + 7 = \sqrt{25}

x+7=\pm 5

Now make two equations

x + 7 = + 5 and x + 7 = -5

x = +5 - 7 = -2

x = -2

And,

x + 7 = -5

x = -5 - 7 = -12

x = -12

Therefore, the solution set of the equation is {-12, -2} and option A is correct

6 0
3 years ago
Read 2 more answers
Is -6 rational or irrational
alexgriva [62]

Answer:

It is a rational number

Step-by-step explanation:

A rational number is defined as numbers written in p/q form ,q not equal to 0,p&q are integers

-6 is same as -6/1

since -6,1 are integers it is a rational..

5 0
4 years ago
Read 2 more answers
What is the point-slope form of a line that has a slope of 5 and passes through the point (3,-4)
AveGali [126]
Y=mx+b so it should be y=3x-4
8 0
3 years ago
Read 2 more answers
Add −1 3/10 + 2/5 using the number line.
DerKrebs [107]

Answer:

-9/10 (in between -1 and -4/5)

Step-by-step explanation:

-1 3/10+2/5

-1 3/10 + 4/10

-13/10+4/10

13/10-4/10=9/10

then put the negative sign in front of the 9/10.

(please give brainliest)

8 0
3 years ago
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