Why does the formula for calculating the sample variance, s squared equals startfraction summation from nothing to nothing left parenthesis x minus x overbar right parenthesis squared over n minus 1 endfraction s2= ∑x−x2 n−1 , involve squaring the difference between each value and the mean?

How many grams the dog will eat in 3 days?

Given: lines a and b are parallel and line c is a transversal. prove: 2 is supplementary to 8 what is the missing reason in the proof? statement reason 1. a || b, is a transv 1. given 2. ∠6 ≅ ∠2 2. ? 3. m∠6 = m∠2 3. def. of congruent 4. ∠6 is supp. to ∠8 4. def. of linear pair 5. ∠2 is supp. to ∠8 5. congruent supplements theorem corresponding angles theorem alternate interior angles theorem vertical angles theorem alternate exterior angles theorem

What is the area of a triangle with a base of 7x and height of 8x expressed as a monomial? question 5 options: 1x 15x2 28x2 56x2