Question 1123964
b, hours babysitting
y, hours yard work


{{{system(b+y<=8,8b+15y>=85)}}}, inequalities; not equations



The second question can be done using equations.
" to exactly meet the income goal and the time constraint."



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{{{system(8b+8y=64,8b+15y=85)}}}

E2 - E1

{{{7y=31}}}

{{{y=3}}}
-
{{{b=5}}}


5 hours babysitting
and
3 hours doing yard work