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ohaa [14]
4 years ago
11

PLEASE HELP HELP HELP HELP HELP HELP

Mathematics
1 answer:
RideAnS [48]4 years ago
7 0

|\Omega|=12\cdot11\cdot10=1320\\|A|=9\cdot8\cdot7=504\\\\P(A)=\dfrac{504}{1320}=\dfrac{21}{55}\approx38.2\%

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How many solutions does the system have? You can use the interactive graph below to find the answer. 4x-2y=8 2x+y=2 4x−2y=8 2x+y
Tju [1.3M]

Answer:

Step-by-step explanation:

We have the following system

\left[\begin{matrix} 4 & -2 \\ 2 & 1 \end{matrix}\right]x =\left[\begin{matrix} 8 \\ 2 \end{matrix}\right]

The number of solutions depend on the determinant of the matrix of the system. If the determinant is different from 0, then it has one unique solution, if it 0 then it has infinite solutions.

Note that the determinant of a matrix

\left[\begin{matrix} a & b \\ c & d \end{matrix}\right] is ad-bc. So in our case we have 4*1-(-2)*2 = 8  which is not 0. Then the system has an unique solution.

6 0
3 years ago
How would I start to solve number 15? Would I use distributive property?
natita [175]
-5-x=2x-(4x+6)

Using the distributive property is the correct first step. (4x+6) is being multiplied by -1, so distributing gives

-5-x=2x+(-4x-6)
-5-x=2x+((-4x)+(-6))

Now, using the associative property of addition, you get

-5-x=(2x+(-4x))+(-6)
-5-x=(2x-4x)-6

Simplify the right hand side:

-5-x=-2x-6

Add 5 and 2x to both sides.

(2x+5)-5-x=(2x+5)-2x-6

On the left side, use the associative property. On the right, commutativity and associativity:

2x+(5-5)-x=5+(2x-2x)-6

Simplify.

2x-x=-1
x=-1
8 0
3 years ago
One in a thousand people are afflicted with the dreaded zigma disease. A pharmaceutical company develops a test for this disease
Anna [14]

Answer:

Option "A" is correct

Step-by-step explanation:

P(A) probability of event A is true

P(B) probability of event B is true

P(AB) probability of event AB is true

P(BA) probability of event BA is true

P(AB)= (BA) × (A)/(B)

4 0
3 years ago
The volume of a cylinder is 4pi x(3) cubic units and its height is x units. Which expression represents the radius of the cylind
vladimir1956 [14]

Answer:

2x

Step-by-step explanation:

Volume of a cylinder is:

V = πr²h

If V = 4πx³ and h = x, then:

4πx³ = πr²x

4x² = r²

r = 2x

5 0
4 years ago
Read 2 more answers
The first person to solve this correctly gets 40 points and brainliest!!!
puteri [66]

Answer:

0.36363.....

repeating

Step-by-step explanation:

given :

total songs downloaded = 44

total favorite band songs = 16

number of favorite songs out of total songs downloaded

= total favorite band songs ÷ total songs downloaded

= 16 ÷ 44

= 0.3636363636363636363...  (answer for part A)

by observation, we can see that the decimals 36 repeats over and over again and never stops. Hence we can say that the decimal is repeating (Answer for part B)

4 0
3 years ago
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