The number of cds sold has decreased each year. the graph shows the number of cds sold in a given year. (coordinate graph) which is a reasonable inference for the number of cds at month 4? a. 1400 b. 1200 c. 1000 d. 900

Find the perimeter of the triangle with vertices  d(3, 4),  e(8, 7), and  f(5, 9). do not round before calculating the perimeter. after calculating the perimeter, round your answer to the nearest tenth.  

I’m really confused and need to learn this

Find the directions in which the function increases and decreases most rapidly at upper p 0p0. then find the derivatives of the function in these directions. f(x, y)equals=x squared plus xy plus y squaredx2+xy+y2, upper p 0p0left parenthesis 1 comma negative 4 right parenthesis