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Elina [12.6K]
3 years ago
5

Annie thought of a number. She then multiplied this number by 2 and then subtracted 4. Her final answer was 10. What number did

she start with?
Mathematics
1 answer:
mario62 [17]3 years ago
3 0

Answer:

Annie thought of the number ; '7'

Step-by-step explanation:

<em>Let the no. be; 'x'</em>

The no. multiplied with 2 = 2x

Then subtracted from 4 = 2x - 4

Final answer= 10

Thus, 2x - 4 = 10

<u>Now lets solve the equation;</u>

2x = 10 + 4 = 14

x = 14 divided by 2 = 7

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Degger [83]

Answer:

Step-by-step explanation:

4 0
3 years ago
Solve X showing every step​
LenKa [72]

Answer:

no solution

Step-by-step explanation:

2x-5=8x+7-6x

2x-5=2x+7

-5=7

Not true so no solution

3 0
3 years ago
The scheduled arrival time for a daily flight from Boston to New York is 9:35 am. Historical data show that the arrival time fol
Lady_Fox [76]

Answer:

The mean is 11.5 minutes and the standard deviation is of 6.64 minutes

Step-by-step explanation:

An uniform probability is a case of probability in which each outcome is equally as likely.

For this situation, we have a lower limit of the distribution that we call a and an upper limit that we call b.

The mean is:

M = \frac{a+b}{2}

The standard deviation is:

S = \sqrt{\frac{(b-a)^{2}}{12}}

Arrival time of 9:18 am and a late arrival time of 9:41 am.

9:41 is 23 minutes from 9:18. So the time is uniformily distributed between 0 and 23 minutes, so a = 0, b = 23.

Mean:

M = \frac{a+b}{2} = \frac{0+23}{2} = 11.5

Standard deviation:

S = \sqrt{\frac{(b-a)^{2}}{12}} = \sqrt{\frac{(23 - 0)^{2}}{12}} = 6.64

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8 0
3 years ago
Which system of inequalities is represented by the graph?
Tamiku [17]
The blue line...
(1,2),(3,1)
slope = (1 - 2) / (3 - 1) = -1/2
there is a y int at (0,2.5) or (0,5/2)
it is shaded below the line....and it is a solid line
this inequality is :
y = -1/2x + 5/2
1/2x + y = 5/2
x + 2y = 5
x + 2y < = 5.....this is ur inequality


red line...
(0,4), (1,1)
slope = (1 - 4) / (1 - 0) = -3/1 = -3

there is a y int at (0,4)
it is shaded below the line...and it is a solid line
this inequality is :
y = -3x + 4
3x + y = 4
3x + y < = 4 ...this is ur inequality

summary :
ur 2 inequalities are : 
x + 2y < = 5 and 3x + y < = 4


4 0
4 years ago
What is 14r-13s+19r+13s-18
Zielflug [23.3K]
77 is ur answer hope this helps u
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3 years ago
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