Answer:
Step-by-step explanation:
Variance of X = 9
Regression equations are
(*) 8x −10y + 66 = 0
(**) 40x −18y − 214 = 0
Find out the following missing results.
(i) The means of X and Y
(ii) The coefficient of correlation between x and y
(iii) The standard deviation of Y
Answer:
63 degrees
Step-by-step explanation:
Since the angles are going counter-clockwise, angle 2 and angle 3 are supplementary, meaning that they add up to 180 degrees.
Since angle 2 is 117 degrees, 180 - 117 = 63. Therefore, angle 3 is 63 degrees
X + y = 20 Substitute
x by 2 y - 4 in x + y = 20 to obtain 2 y •
4 + y = 20 Solve for y to find y = 8 and
x = 2y - 4 = 12
Answer:
A. True
B. False
Step-by-step explanation:
B is false because rational numbers have either repeating decimals or numbers that come to an end.
Multiply the first equation by -2 gives:_
-2y = -8 + 2x
2y = 8 - 2x
adding these 2 equations:-
0 = 0
This shows that the 2 equations are equal so there are infinite solutions
