A=pi radius^2
7 is the radius
Pi7^2=153.93
Answer:
a u have to choose
Step-by-step explanation:
Answer:
So then the correlation coefficient would be r =0.8465
And the best options would be:
(D) 0.847
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.
And in order to calculate the correlation coefficient we can use this formula:
Solution to the problem
Data given:
X: 8 10 7 13 7 9 9 10 11 8
Y: 60 75 55 83 61 73 80 85 85 66
For our case we have this:
n=10
And if we replace into the formula we got:
So then the correlation coefficient would be r =0.8465
And the best options would be:
(D) 0.847
Answer:
B. x(x) + (−6)(−3)
NOT equivalent to (x − 6)(x − 3)
Step-by-step explanation:
(x − 6)(x − 3)
= x^2 - 3x - 6x + 18
= x^2 - 9x + 18
A. (6 − x)(3 − x)
= 18 - 6x - 3x + x^2
= 18 - 9x + x^2
= x^2 - 9x + 18 ---->equivalent to (x − 6)(x − 3)
B. x(x) + (−6)(−3) = x^2 + 18 ----> NOT equivalent to (x − 6)(x − 3)
C. x2 − 3x − 6x + 18 = x^2 - 9x + 18 --> equivalent to (x − 6)(x − 3)
D. x(x − 6) − 3(x − 6)
= x^2 - 6x - 3x + 18
= x^2 - 9x + 18 ---->equivalent to (x − 6)(x − 3)