Question 935831

The band will set aside:  ${{{420+8400=8820}}}
{{{42}}} new uniforms will cost {{{42*x}}}

so,  we have {{{42*x+8820}}} and that should be  at least ${{{11340}}} and at most ${{{12390}}}.

 {{{11340 <=42x+8820<= 12390}}}

{{{11340-8820 <=42x< =12390-8820}}}

{{{2520 <=42x< =3570}}}

{{{2520/42 <=x< =3570/42}}}

{{{60<=x<= 85}}}

so, your answer is: B.{{{60<=x<= 85}}}