In four years time a mother will be three times as as old as her son. four years ago she was five times as old as her son. find their present ages

The mother is 44 and the son is 12 presently.

$7.50x+$4.50y=midk it's been awhile since i've done one of these

In all honesty, there really is no “work” per say to show. mainly it’s just using the process of elimination. the question is asking which domain(s) would be the most appropriate for the function c(n). n is the number of observed vehicles so right away, 1, 2, and 3 can be eliminated.why? 1, 2 start in the negatives and therefore it is impossible to observe negative cars. so, #4 would be the best answer to the given problem.