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Nuetrik [128]
3 years ago
13

If 9 : x = x:4, then x =

Mathematics
1 answer:
miskamm [114]3 years ago
5 0

Answer:

x = ±6

Step-by-step explanation:

9 : x = x : 4

Cross multiply

36 = x²

Take the square root of both sidesw

x = ±6

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coldgirl [10]
The answer is 1.0469903e+17 Hope this helped 
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3 years ago
Emily is 2 years older than Alysson. The product of their age is 440. How old are they?
Nuetrik [128]
Call Emily's age is x, we have:
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5 0
2 years ago
Find the volume of a cone with a height of 12m and a base diameter of 10m. Use the value 3.14 for π, and do not do any rounding.
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4 0
2 years ago
5 Consider this system of equations:<br> 5x + y = -2<br> 2x - 2y=4
Ilia_Sergeevich [38]

Answer:

x  = 0

  y  = -2

Step-by-step explanation:

The given system of equation are:

   5x + y = -2

   2x - 2y = 4  

The problem here is to find x and y from the expression

   5x + y = -2     ----- i

   2x - 2y = 4    ---- ii

 So;

i x 2 :  10x + 2y  = -4     ----  iii

ii x 5 :  10x - 10y  = 20    ----- iv

   iii - iv;   12y  = -24

                  y  = -2

    Now find x;

             5x + y  = -2

             5x  - 2  = -2

                  x  = 0

 

7 0
2 years ago
Find the value of x.<br> 2x420<br> 3x+10
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Answer:

2x+20+3x+10 = 180 (int. angles, parallel)

5x+30 = 180

5x=150

x=30

5 0
2 years ago
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