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3 years ago

Solve the equation -2(m-30)=-6m

Mathematics

1 answer:

Sergio039 [100]3 years ago

7 0

Answer:

m=-15

Step-by-step explanation:

Isolate the variable by dividing each side by factors that don't contain the variable. m=-15

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1/5

Step-by-step explanation:

polygon B's area is 5 times greater than polygon A

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Katen [24]

(x+4)/(x-2) >0
multiply both sides by x-2
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subtract 4 from both sides
x > - 4

the solutions to this inequality are
x< −<span>4 or x>2

Hope this helps :)
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3 years ago

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3 years ago

The brain volumes (cm cubed) of 20 brains have a mean of 1162.8 cm cubed and a standard deviation of 127.1 cm cubed. Use the g

Free_Kalibri [48]

Answer:

- The limits are 908.6 cm^3 and 1417cm^3

- 1337.0cm^3 is in between the limits

Step-by-step explanation:

To determine the limit by taking into account the range rule of thumb, you use the fact that the limits are given by the mean plus and minus twice the standard deviation, that is:

$\overline{x}\pm 2\sigma$ (1)

$\overline{x}$ : mean of brain volume = 1162.8 cm^3

σ: standard deviation = 127.1 cm^3

You replace the values of the parameters in the equation (1):

$1162.8cm^3+2(127.1cm^3)=1417cm^3\\\\1162.8cm^3-2(127.1cm^3)=908.6cm^3$

Limits = (1417 , 908.6)

The limits are 908.6 cm^3 and 1417cm^3

1337.0cm^3 is in between the limits calculated above.

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3 years ago