ANSWER:
[tex]0.10\cdot d+0.25\cdot q\ge4[/tex]STEP-BY-STEP EXPLANATION:
Let d be dimes and q be quarters. We have that their equivalences are the following
d dimes = 0.10 dollars
q quarters = 0.25 dollars
Now according to the statement we can establish the following inequality
[tex]0.10\cdot d+0.25\cdot q\ge4[/tex]