kathryn, a college student, works part time at a coffee house. she worked 5 startfraction 7 over 20 endfraction hours on monday, 4 and one half on tuesday, 6 and three fourths on wednesday, 3 and one fourth on thursday, and 7 on friday. how many hours did she work altogether? she worked nothing hours altogether.

David bought a poster for an art project. the poster is 2.7 feet wide and 3.9 feet tall. what is the area of the poster?

Each of the walls of a room with square dimensions has been built with two pieces of sheetrock, a smaller one and a larger one. the length of all the smaller ones is the same and is stored in the variable small. similarly, the length of all the larger ones is the same and is stored in the variable large. write a single expression whose value is the total area of this room. do not use any method invocations.

What number should be added to the expression x^2+3x+ in order to create a perfect square trinomial? 3/2 3 9/4 9