A rectangular playground is to be fenced off and divided in two by another fence parallel to one side of the playground. Eight hundred and forty feet of fencing is used. Find the dimensions of the playground that maximize the total enclosed area. What is the maximum area?

Aright triangle includes one angle that measures 30º. what is the measure of the third angle? a. 30º b. 90º c. 60º d. 130º

Which composition of similarity transformations maps polygon abcd to polygon a'b'c'd'? a dilation with a scale factor less than 1 and then a reflection a dilation with a scale factor less than 1 and then a translation a dilation with a scale factor greater than 1 and then a reflection a dilation with a scale factor greater than 1 and then a translation

Does anyone know how to solve and graph this: 4 + | a + 2 | < 7the only part i don't get is the "4 +"