What is the combined length of the ruler and a yardstick in inches
One yard stick has a length of 36 inches, while a ruler as a length of 12 inches. If both lengths are combined, you will have 12 + 36 = 48 inches. Check out http://www.studyzone.org/testprep/math4/d/ruler4l.cfm.
36 + 12 I think you should be able to do the rest
well, if you looking at a 12" ruler and a yard stick at being 36", you be at 48"
Counting was not your best subject in school, eh?
what's this obsession with inches.....hmmm?