Resuelve:
25+40-(6-4)+(8-9)

What is the missing step in this proof ?

Rena is building a 1: 180 scale model of a real castle. her model has a rectangular base that is 3 feet wide and 4 feet long what is the area of the base of the actual castle in square feet

Alogical argument that is presented in graphical form using boxes and arrows is called?