David has a collection of computer games. last year, he had 400 cds in his collection and this year he has 120% as many cds as he had last year. what is the size of his cd collection this year?

One line passes through (-7,-4) and (5,4) . another line passes through the point (-4,6) and (6,-9)

The sum of the first eight terms of an arithmetic progression is 9m + 14. the fifth term of the06 progression is 2m - 6, where m is a constant.given that the first term of the progression is 26,find the value of the common difference, d and thevalue of m.

The perimeter of a rectangular lot of land is 436 ft. this includes an easement of x feet of uniform width inside the lot on which no building can be done. if the buildable area is 122 ft by 60 ft, determine the width of the easement. select one: a. 9 feet b. 18 feet c. 4.5 feet d. 7 feet