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2 years ago

James buys 2 4/5 kilograms of red potatoes. He buys yellow potatoes that weigh 3/4 as much as the red potatoes.

Mathematics

1 answer:

Illusion [34]2 years ago

8 0

Answer:

Step-by-step explanation:

2 4/5 kg” would equal as a whole number 14/5 kgs, or 2.8, divided by 3/4’s would be 2.1 kgs.

As a mixed number there would be 2 1/10’s.

2 1/10.

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What fraction is equivalent to 80%

Gnesinka [82]

Percent means parts out of 100
80%=80/100=8/10=4/5

8 0

3 years ago

Read 2 more answers

The number of motor vehicles registered in millions in the US has grown as follows:

zysi [14]

Answer:

a) Figure attached

b) $r=\frac{n(\sum xy)-(\sum x)(\sum y)}{\sqrt{[n\sum x^2 -(\sum x)^2][n\sum y^2 -(\sum y)^2]}}$

For our case we have this:

n=10 $\sum x = 75.819, \sum y = 43.5231, \sum xy = 330.0321, \sum x^2 =574.8598, \sum y^2 =192.8274$

$r=\frac{10(330.0321)-(75.81948)(43.5231)}{\sqrt{[10(574.8598) -(75.819)^2][10(192.8274) -(43.5231)^2]}}=0.989$

So then the correlation coefficient would be r =0.989

Step-by-step explanation:

Previous concepts

The correlation coefficient is a "statistical measure that calculates the strength of the relationship between the relative movements of two variables". It's denoted by r and its always between -1 and 1.

Solution to the problem

Part a

Year (x): 1940, 1945 1950, 1955, 1960, 1965, 1970, 1975, 1980, 1985

Vehicles (Y): 32.4, 31.0, 49.2, 62.7, 73.9, 90.4, 108.4, 132.9, 155.8, 171.7

After apply natural log for the two variables and create the scatterplot in excel we got the following result on the figure attached.

Part b

And in order to calculate the correlation coefficient we can use this formula:

$r=\frac{n(\sum xy)-(\sum x)(\sum y)}{\sqrt{[n\sum x^2 -(\sum x)^2][n\sum y^2 -(\sum y)^2]}}$

For our case we have this:

n=10 $\sum x = 75.819, \sum y = 43.5231, \sum xy = 330.0321, \sum x^2 =574.8598, \sum y^2 =192.8274$

$r=\frac{10(330.0321)-(75.81948)(43.5231)}{\sqrt{[10(574.8598) -(75.81948)^2][10(192.8274) -(43.5231)^2]}}=0.989$

So then the correlation coefficient would be r =0.989

4 0

2 years ago

HELP PLS FOR 10 POINTS AND BRAINLIEST TO CORRECT ANSWER The cost, C, to ride in a taxi can be calculated using the function show

max2010maxim [7]

9514 1404 393

Answer:

A. $0.85

Step-by-step explanation:

Each time m increases by 1, the cost goes up by $0.85.

The cost per mile is $0.85.

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3 years ago

Solve the following proportion: (round to the nearest tenths place if necessary)

romanna [79]

Solution:

4/7 = 10/x

To find the solution to the proportion, we will need to simplify the equation (4/7 = 10/x)

4/7 = 10/x
=> 4x = 70
=> x = 70/4 = 35/2 = 17.5.

Hoped this helped!

8 0

2 years ago

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Jared and maila will usually both run 3 miles each time they go running .This month,jared ran an additional 21 miles. Which answ

jeyben [28]

Answer:

Total = m + j

= 3 + m + 21

Step-by-step explanation:

Mails = 3 miles

Jared = 3 miles + 21 miles

j = m + 21

m = 3

Total = m + j

= 3 + m + 21

Where,

m = 3

Total = 3 + m + 21

= 3 + 3 + 21

= 27

3 0

3 years ago