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3 years ago

The question is down below. AB=

Mathematics

1 answer:

Mamont248 [21]3 years ago

8 0

Answer:

Step-by-step explanation:

This time we use the sin identity.

I am too lazy to write it out again but the answer is 6.97

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Draw the straight line y= 2-x

klio [65]

Answer:

Step-by-step explanation:

4 0

3 years ago

Read 2 more answers

two boys decided to buy a computer. The second boy had 5/6 of the amount of money the first had. The first boy had 7/8 of the pr

just olya [345]

Answer:

1152$

Step-by-step explanation:

b1 = 7/8 C

b2 = 5/6 b1 = 35/ 48 C

7/8 C + 35/48 C = C + 696

42/48 C + 35/48 C = 48/48 C + 696 * 48/48

(42 + 35 - 48 ) C = 696 * 48

29 C = 33408

C =1152.

8 0

2 years ago

If someone could help me that would be amazing! Thank you!

Anastasy [175]

I’d say 135 or B! I hope this helps!

4 0

3 years ago

Number 35 plz and thank you ☺️ worth 25 points

Whitepunk [10]

There are 7 kids to each group!

5 0

3 years ago

Read 2 more answers

Questions 2-7 will all be in regards to this data set:Observation X Y1 20 302 23 353 28 404 26 385 24 376 32 457 35 508 24 349 3

Tomtit [17]

Answer:

r =0.4437

Step-by-step explanation:

We have the follwoing dataset:

X: 20,23,53,4,24,32,35,24,31,23

Y: 30,35,40,38,37,45,50,34,42,32

n=10

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.

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 $\sum x = 269, \sum y = 383, \sum xy = 10609, \sum x^2 =8645, \sum y^2 =15007$

Th excel figure attached shows the calculations for each sum.

$r=\frac{10(10609)-(269)(383)}{\sqrt{[10(8645) -(269)^2][10(15007) -(383)^2]}}=0.4437$

So then the correlation coefficient would be r =0.4437

3 0

4 years ago