Find the missing side in the similar figures below

Find the complete factored form of the polynomial 40m^3n^2+45m^2n^6

Julius sold five times as many computers as sam sold last year. in total, they sold 78 computers. how many computers did julius sell?

Afarmer has a large field that is x feet in length. he wants to fence in a rectangular section in the middle of the field , leaving a length of 100 feet of open field behind each end of the fenced rectangle.he also wants the width of the fenced-in space to be 100 feet less than its length. find the expressions to represent the length and width of the fenced section of the field