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timurjin [86]
3 years ago
11

Solve the equation for x. X +9= -11

Mathematics
2 answers:
Vera_Pavlovna [14]3 years ago
7 0

Answer:

x=-20

Step-by-step explanation:

x+9=-11

Subtract 9 from both sides. (-11-9=-20)

x=-20

zavuch27 [327]3 years ago
4 0

Answer:

x=-20

Step-by-step explanation:

subtract 9 from both sides

x+9-9=-11-9

x=-20

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Softa [21]

Answer:

Trying to use a subject pronoun like he in a place of pool if the substituting sounds all right then use the subjective form who whom on the other hand is an object pronoun objective case therefore it should be used whenever it will do the job of direct object indirect object or object of preposition

Step-by-step explanation:

7 0
3 years ago
The graph below shows Roy's distance from his office (y), in miles, after a certain amount of time (x), in minutes: Graph titled
Marina CMI [18]

Answer:

Felix

Step-by-step explanation:

The graph contains 3 segments,

first one is for the first 4minutes,

second one is for the next 2 minutes (standing still)

third one is for the last 2 minutes.

Only Felix has it right, the other students use absolute time in their statements, in stead of the difference between start and end. (e.g., from 4 to 6 is 2 minutes).

8 0
3 years ago
Suppose that X is a random variable with mean 30 and standard deviation 4. Also suppose that Y is a random variable with mean 50
Vladimir79 [104]

Answer:

a) Var[z] = 1600

    D[z] = 40

b) Var[z] = 2304

    D[z] = 48

c) Var[z] = 80

    D[z] = 8.94

d) Var[z] = 80

    D[z] = 8.94

e) Var[z] = 320

    D[z] = 17.88

Step-by-step explanation:

In general

V([x+y] = V[x] + V[y] +2Cov[xy]

how in this problem Cov[XY] = 0, then

V[x+y] = V[x] + V[y]

Also we must use this properti of the variance  

V[ax+b] = a^{2}V[x]

and remember that

standard desviation = \sqrt{Var[x]}

a) z = 35-10x

   Var[z] = 10^{2} Var[x] = 100*16 = 1600

   D[z] = \sqrt{1600} = 40

b) z = 12x -5

   Var[z] = 12^{2} Var[x] = 144*16 = 2304

   D[z] = \sqrt{2304} = 48

c) z = x + y

   Var[z] =  Var[x+y] = Var[x] + Var[y] = 16 + 64 = 80

   D[z] = \sqrt{80} = 8.94  

d) z = x - y

   Var[z] =  Var[x-y] = Var[x] + Var[y] = 16 + 64 = 80

   D[z] = \sqrt{80} = 8.94

e) z = -2x + 2y

   Var[z] = 4Var[x] + 4Var[y] = 4*16 + 4*64 = 320

  D[z] = \sqrt{320} = 17.88

   

7 0
3 years ago
What is the answer to this equation 6x+3-6x=3
aev [14]

Answer:

0=0

Step-by-step explanation:

6x-6x=0

cancel the terms on both sides of the equation

0=0  the sum of two opposites equals zero

this statement is correct

5 0
3 years ago
I need help with this question ​
Helga [31]

i think its f it just seems to be the most reasonable awnser a and i dont know this stuff :P

Step-by-step explanation:

6 0
2 years ago
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