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3 years ago

Can Someone Help? Thanks!

Mathematics

1 answer:

strojnjashka [21]3 years ago

6 0

Answer:

5x + y = 100

Step-by-step explanation:

If Joseph spends $5 per day, then the dollar amount he has spent after x days is 5x. The equation is to be written in the form ...

amount spent + amount remaining = original amount

Then using the given variables and values, this becomes ...

5x + y = 100

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Anita took 1/6 of a cake and Barry took 60% of what remained. What fraction of original cake is left. Explain full method.

amm1812

The cake = 1
1-1/6=5/6
60% as a fraction =3/5
5/6-3/5
25/30-18/30
7/30
There are 7/30 of the original cake left.

Hope this helps :)

7 0

3 years ago

Read 2 more answers

Consider the relationship between the number of bids an item on eBay received and the item's selling price. The following is a s

n200080 [17]

Answer:

Let's assume the following data:

Price in Dollars (X) 26 29 32 38 47

Number of Bids (Y) 12 13 15 16 18

For our case we have this:

n=10 $\sum x = 172, \sum y = 74, \sum xy = 2623, \sum x^2 =6194, \sum y^2 =1118$

$r=\frac{5(2623)-(172)(74)}{\sqrt{[5(6194) -(172)^2][5(1118) -(74)^2]}}=0.974$

So then the correlation coefficient would be r =0.974

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

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

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

Let's assume the following data

Price in Dollars (X) 26 29 32 38 47

Number of Bids (Y) 12 13 15 16 18

For our case we have this:

n=10 $\sum x = 172, \sum y = 74, \sum xy = 2623, \sum x^2 =6194, \sum y^2 =1118$

$r=\frac{5(2623)-(172)(74)}{\sqrt{[5(6194) -(172)^2][5(1118) -(74)^2]}}=0.974$

So then the correlation coefficient would be r =0.974

5 0

3 years ago

Point p is on the terminal side

strojnjashka [21]

The value of the cotΘ will be 1.It is the ratio of the base and the perpendicular.

<h3>What is trigonometry?</h3>

The field of mathematics is concerned with the relationships between triangles' sides and angles, as well as the related functions of any angle.

The value of the cotΘ is found as;

$\rm cot \theta = \frac{B}{P} \\\\ \rm cot \theta = \frac{5}{5} \\\\ cot \theta = 1$