Answer:
9
Step-by-step explanation:
The mean squared error (MSE)of a set of observations can be calculated using the formula :
(1/n)Σ(Actual values - predicted values)^2
Where n = number of observations
Steps :
Error values of each observation (difference between actual and predicted values) is squared.
Step 2:
The squared values are summed
Step 3:
The summation is the divided by the number of observations
The difference between the actual and predicted values is known as the ERROR.
(1/n)Σ(ERROR)^2
n = 3
Error = +3, +3, - 3
MSE = (1/3)Σ[(3)^2 + (3)^2 + (-3)^2]
MSE = (1/3) × [9 + 9 + 9]
MSE = (1/3) × 27
MSE = 9
Answer:
the y intercept is -50
Step-by-step explanation:
in y=mx+b, m is the slope and b is the y intercept. We are given the point (900,1150) and a slope of 4/3
we can susbstitute 4/3 into the equation.
y=4/3x+b
since the line will go through the point (900,1150), we can plug it into the equation.
1150=4/3(900)+b
1150=1200+b
-50=b
we are left with the y intercept (b) being -50. As a point, it's (0,-50)
Hope this helps!
Answer:
Step-by-step explanation:
b/c they are similar triangles and b/c you know one has an angle of 59 and the other has an angle of 75 that they both have those angels.. and that the total is 180
they are asking what is angle S .. that looks like it's the same one as angle P on the other triangle so ...
S= 59°
(3x + 1) + 44 = 90
(3x + 1) = (90 - 44) = 46
3x = 45
x = 45 / 3
x = 15
