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2 years ago

Solve the expression 2(10)+2(x-4) show your work

Mathematics

1 answer:

Nataliya [291]2 years ago

4 0

Answer:

12 + 2x

Step-by-step explanation:

simplifying expression:

2(10) + 2(x-4)

2 × 10 = 20

2 × x = 2x

2 × -4 = -8

20 + 2x - 8

20 - 8 = 12

12 + 2x

if you want to simplify it more:

(12/2) + (2x/2)

2(6 + x)

if you want to solve for x:

12 + 2x = 0

(12 - 12) + 2x = (0 - 12)

2x/2 = -12/2

x = -6

hope this helps you!

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Answer:

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3 years ago

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Circle towns limit form a perfectly circular shape that has a population of 20000 in the population density of 480 people per sq

Alex

Answer:

$D =\frac{P}{\pi X^2}$

And solving for the radius we got:

$X = \sqrt{\frac{P}{\pi D}}$

And replacing the data given we got:

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And this value converted to meters is $X = 87.40 m$

Step-by-step explanation:

For this case we know the population size $P = 20000$ and we also know the population density $D = 480 \frac{people}{km^2}$

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Where P represent the number of people and A the area. Since we are assuming a circle then the area is given by:

$A = \pi X^2$

With X the radius of the circle

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$D =\frac{P}{\pi X^2}$

And solving for the radius we got:

$X = \sqrt{\frac{P}{\pi D}}$

And replacing the data given we got:

$X = \sqrt{\frac{480 \frac{people}{km^2}}{\pi *20000 people}}= 0.0874Km$

And this value converted to meters is $X = 87.40 m$

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3 years ago

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Step-by-step explanation:

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