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velikii [3]
3 years ago
9

Please answer I’ll rate brainlyest

Mathematics
1 answer:
elixir [45]3 years ago
6 0

Answer:

The third choice is correct

Step-by-step explanation:

The given expression is

2^n-1

when n=7, we substitute into the formula to obtain;

2^7-1

Note that;

2^7=2\times 2\times 2\times 2\times 2\times 2\times 2=128

2^7-1=128-1=127

The third choice is correct

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Would you use the median or mean to describe the center of each data set? Explain your reasoning. Heights of 50 basketball playe
Ludmilka [50]

Answer:

Median is used to describe the center of the data of heights of 50 basketball players.

Step-by-step explanation:

The median divides the data into two equal parts.

It can be used to describe the center of the data.

The mean gives the average where most data lies.

The advantages of median are

1)it is located even when the values are not capable of quantitative measurements.

2) It is not affected by extreme values > It can be computed even when a frequency distribution  involves open end classes like those of income and prices.

3) In a highly skewed distribution median is appropriate average to use.

The disadvantages of the mean are

1) it is greatly affected by extreme values.

2) It sometimes gives fallacious conclusions.

3) In a highly skewed distribution mean is  not an appropriate average to use.

4) It cannot be computed even when a frequency distribution  involves open end classes like those of income and prices.

4 0
3 years ago
The label on a 2 1/2 pound grass seeds states that it will cover an area of 400 Square feet based on the information what is the
Nostrana [21]

Answer:

B.

Step-by-step explanation:

if you want to check it would be

160 x 2.5 = 400

OR

400 / 2.5 = 160

i hope this helps!

5 0
3 years ago
A grocer wanted to mix 19 liters milk of $2.2 with 1 kg cacao to make a mixture of hot chocolate. What should be the cost of mil
Ad libitum [116K]

Answer:

for this, I'm going to assume that the cacao powder costed $2.2. If the cacao costs $2.2 then the milk will cost $0.8.

Step-by-step explanation:

If you subtract 2.2 from 3 then you get 0.8. Also if you add 2.2 with 0.8 then you get 3. another way to simplify it is to add one zero on the end, like this 22+8=30.

4 0
3 years ago
Mrs. Lenz rented a scooter during her beach vacation. The cost of the scooter rental is shown for different periods of time. Wha
iragen [17]

Answer:

The unit rate of $10 per hour.

Step-by-step explanation:

Given

x = time

y = amount

(x,y) = (1,10)

See attachment for graph

Required

What does the given point represents

From the attachment, the origin of the graph is:

(x_1,y_1) = (0,0)

and we have the given point to be:

(x_2,y_2) = (1,10)

Calculate the slope (m)

m = \frac{y_2 - y_1}{x_2 - x_1}

m = \frac{10-0}{1-0}

m = \frac{10}{1}

m = 10

The slope represents $10/1 hour

Hence:

(x,y) = (1,10) means the unit rate is $10 per hour

8 0
3 years ago
What is 2+2 im losing my mind today
irina1246 [14]
4 the answer is four 1234
5 0
3 years ago
Read 2 more answers
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