Find the first partial derivatives of the function. (Sn = x1 + 2x2 + ... + nxn; i = 1, ..., n. Give your answer only in terms of Sn and i.) u = sin(x1 + 2x2 + ⋯ + nxn)

Measures of the angle of r, 31 s (x+4) t (3x+9)

Galen sold tickets of his church’s carnival for a total of $2,820. children’s tickets cost $3 each and adult tickets cost $5 each. the number of children’s tickets sold was 30 more than 3 times the number of adult tickets slod. how many children’s ticket and how many adult tickets did he sell?

Angle xyz is formed by segments xy and yz on the coordinate grid below: a coordinate plane is shown. angle xyz has endpoints at 3 comma negative 1 and 6 negative 2 and 3 comma negative 3 and measures 36.87 degrees. angle xyz is rotated 270 degrees counterclockwise about the origin to form angle x′y′z′. which statement shows the measure of angle x′y′z′?