Use summation notation to express each of the following calculations Add the scores and square the sum O 2(SX) Square each score and then add the squared values. Σ(X + 2)2 O Σ(2x + 1) Subtract 2 points from each score and then add the resulting values. O (2x)2-2 Σ(X-29 O Σ(x-2) Subtract 1 point from each score and square the resulting values. Then add the squared values. Σ(X-1)2 O (2x)2-1 Σ(X-1)

a)

Add the score and then square the sum.

By using the summation notation we can write the above statement is (Σx)²

b)

Square each score and then add the squared values.

By using the summation notation we can write the above statement is Σx²

Subtract 2 point from each score and then add the resulting values.

By using the summation notation we can write the above statement is  Σ(x-2)

Subtract 1 point from each score and square the resulting values. Then add the squared values.

By using the summation notation we can write the above statement is Σ(x-1)²

company a

step-by-step explanation:

using the linear regression models , it is found that company a   pays about $14 more. but using the same regression (linear) company b pays about $10 more.

so company a pays more than b