F(x, y)=x22+8y3+3y2−5x have a global maximum and global minimum? if it does, identify the value of the maximum and minimum. if it does not, be sure that you are able to explain why.

If the ratio of sum of the first m and n terms of an ap is m2 : n2 , show that the ratio of its mth and nth terms is (2m − 1) : (2n − 1).

Asmall business produces and sells balls. the fixed costs are $20 and each ball costs $4.32 to produce. each ball sells for $8.32. write the equations for the total cost, c, and the revenue, r, then use the graphing method to determine how many balls must be sold to break even.

Jimmy can run 3.5 miles in 20 minutes. how far can ne run in one hour and ten minutes?