Question 437898
Let {{{x}}} = the grade she needs
{{{ ( 80 + 84 + 72 + x) / 4 = 85 }}}
{{{ 80 + 84 + 72 + x = 340 }}}
{{{ 236 + x = 340 }}}
{{{ x = 104 }}}
Looks like she can't do it unless she gets a 104