Make h the subject A=1/2(a+c)h

Which is the completely factored from of xy^3-x^3y

Abarbecue sold 26 hamburgers and hot dogs. hamburgers sell for $3.50 each and hot dogs sell for $2.00 each. if the barbecue made $70 in sales, determine and state the number of hot dogs sold.

If private savings 'v' = 0.75s and total savings 's' equals $4.20 billion, solve for public and private savings.