Calculate ∬S f(x, y,z) dS where f(x, y,z)=z and S is the surface created by
y=2−z2 , 0≤x, z≤9

Timed*** there are 8 rows and 8 columns, or 64 squares on a chessboard. suppose you place 1 penny on row 1 column a, 2 pennies on row 1 column b, 4 pennies on row 1 column c, and so on … how many pennies are on each square? a =   b =   c = d =   e =   f = g =   h =

Rose drew a regression line for this paired data set. her line passed through (1, 2) and (3, 5) . what is the equation of rose's regression line?

Solve this system of equations. 12x − 18y = 27 4x − 6y = 10