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2 years ago

8

Yo plz help me I don’t know this Which number line shows the solution to -6 - (-4)?

1 answer:

Airida [17]2 years ago

3 0

Answer:

B

Step-by-step explanation:

To solve -6-(-4) you need to break it down.

First, multiply -(-4) which would equal 4 (negative times negative equals positive)

Then add 4 to -6 (-6+4)

This equation is being expressed through option B

Hope this helps! :)

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Your employer has 600 business cards printed for you, and you give away 280 of them. To the nearest hundredth, what percent of t

Ulleksa [173]

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600 - 280 = 320 cards are left

320 / 600 = 8 / 15 = 0.5333 = 53.33%

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The population of a city is 250,000 and the annual growth rate is 2.2%. Write an equation to model the population y after x year

Zinaida [17]

Answer:

$y= 250000(1.022)^x$

Step-by-step explanation:

The population of a city is 250,000 and the annual growth rate is 2.2%

General equation for exponential growth is

$y= P(1+r)^x$

Where y is final population and P is the initial population

'r' is the rate of growth and x is the number of years

p = 25000 and r= 2.2%= 0.022. Replace all the values in the general equaiton

$y= P(1+r)^x$

$y= 250000(1.022)^x$

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3 years ago

Suppose a population has a mean weight of 180 pounds and a standard deviation of 25 pounds. a sample of 100 items is drawn from

Angelina_Jolie [31]

Solution: We are given:

μ=180,σ=25,n=100

Therefore the standard error of the mean is

$\frac{standard deviation}{\sqrt{n}}$

$\frac{25}{\sqrt{100}}$

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6 0

3 years ago

to increase the mean of 4 numbers by 2, by how much would the sum of the 4 numbers have to increase? check image.

solong [7]

Answer:

8

Step-by-step explanation:

x=average

(x+x+x+x)/4=average

to increase x by 2 you add 2

x+2=average

(x+2+x+2+x+2+x+2)=4=(4x+8)/4=x+2

you'd have to increase the sum by 8 to make the numbers' averages' go up by 2

8 0

2 years ago