If a+b+c+d=20 and a^2+b^2+c^2+d^2=108 then the variance of the data is?

I think it's 27 because it's given a²+b²+c²+d²=108

hudafn avatar

So we have to figure out the mean

hudafn avatar

So 108/4=27

hudafn avatar

Hope this helps

Step-by-step explanation:

given : the shape of his satellite can be modeled by   where x and y are modeled in inches.

now,the given equation   is a equation of parabola.

here, coefficient of x is positive, hence the parabola opens rightwards.

on comparing this equation with standard equation , we get

in standard equation, coordinates of focus=(0,m)

thus for given equation coordinates of focus=(0,1.5)

step-by-step explanation:

60 for the first and 130 for the second

step-by-step explanation: