Question 1205777
Taking to mean at least three times as long as for Algebra than for Chemistry
this becomes  ,  a and c, Algebra and Chemistry,
{{{system(a/c>=3,a+c<22)}}}.


You can answer the two specific questions at the end simply by substitution and see if the 
system is true or false.


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Use desmos.com  (online)  to graph the system as {{{system(y<=x/3,y<-x+22)}}}.
That is x for "Algebra" and y for "Chemistry".  Or do the graphing on normal graphing paper.  Understand, only non-negative values for x and y.