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3 years ago

Forty-five percent of the 300 shoppers in a supermarket bought milk. How many of the shoppers in a supermarket bought milk?

1 answer:

7 0

Turn 45% into a decimal. You get 0.45, because you move the decimal two places to the left.

Then multiply 300*0.45
You get 135

135 Shoppers in the supermarket bought milk.

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Find the population variance of: 4 6 8 9 9 round to the nearest hundredth

soldi70 [24.7K]

Answer:

Step-by-step explanation:

To find the population variance, we first need the mean:

$\bar{x}=\frac{4+6+8+9+9}{5}=\frac{36}{5}=7.2$ so the mean is 7.2. To find the population variance (which is almost exactly the same as the sample variance except for a small difference in the denominators of the formula) we have to take each number minus the mean, and then square the difference. Add together all these squared numbers and then divide by the number of numbers. Like this:

$(4-7.2)^2=10.24\\(6-7.2)^2=1.44\\(8-7.2)^2=.64\\(9-7.2)^2=3.24\\(9-7.2)^2=3.24$

Add together those numbers and divide them by 5:

$\sigma=\frac{10.24+1.44+.64+3.24+3.24}{5}=\frac{18.8}{5}=3.76$

5 0

2 years ago

What is the slope of the line graphed on the coordinate plane

Mice21 [21]

Answer:

The slope = 3/4

Step-by-step explanation:

$m=\frac{y_{2}-y_{1} }{x_{2}-x_{1} }$

$m=\frac{6-3}{2-(-2)}=\frac{6-3}{2+2}$

m = 3/4

5 0

2 years ago

Read 2 more answers

3^3x+1= 81 Solve the exponential function

Reil [10]

Answer:

x=1

Step-by-step explanation:

3^ (3x+1) = 81

Rewrite 81 as a power of 3

3^4

3^ (3x+1) = 3^4

Since the bases are the same, the powers are the same

3x+1 =4

Subtract 1 from each side

3x+1-1 =4-1

3x=3

Divide by 3

3x/3 = 3/3

x =1

8 0

3 years ago

Do the table and the equation represent the same function?

VARVARA [1.3K]

The table indicates a y-value of 115 when x = 0. That corresponds to the y-intercpt of the equation.

The table values increase by 64 for each increase of 2 in x-value. That corresponds to the slope (32) of the equation.

Yes, the equation and the table represent the same function.

6 0

3 years ago

[100 Points] George and Carmen went on a bicycle trip. They took a bus to their starting point, and then biked the rest. They tr

Andreas93 [3]

Ussed = x
biked = 75 + x

total trip = 325 = x + (75 + x)
325 = 75 + 2x
250 = 2x
x = 125

biked = 75 + x = 75 + 125 = 200 km

4 0

3 years ago

Read 2 more answers