Answer:
ab(7a+b-2)
Step-by-step explanation:
see the common and take out the common parr
Answer:
The correct option is (a).
Step-by-step explanation:
The general least square regression line is given by,
Here,
X = independent variable
Y = dependent variable.
<em>b</em> = slope (or regression) coefficient
<em>a</em> = intercept
The main purpose of the least square regression line is to predict the value of the dependent variable when the independent variable is known.
So, the correct interpretation is:
A least squares regression line can be used to predict a value of y if the corresponding x value is given.
The correct option is (a).
Answer: 5.22m
Step-by-step explanation:
Using the rule of similar triangles where the the side lengths of two similar triangles are proportional
Parameters :
Tree height = t
Raul's height = 1.53m
Height of Raul's shadow = 8.73m
Total length of tree shadow = distance walked along tree shadow+ distance left to the end of tree shadow, Therefore,
Total length of tree shadow = 21.11 + 8.73 = 29.84m
Therefore,
Raul's ratio = tree's ratio
Raul's height : Raul's shadow = tree height : tree shadow
1.53 : 8.73 = t : 29.84
1.53/8.73 = t/29.84
1.53 × 29.84 = 8.73× t
t = 45.6552 / 8.73
t = 5.22m