Question 630476
Let {{{ x }}} = the number of pounds that you buy
Let C = the total cost of watermelon bought
{{{ C = .49*25 + ( x - 25 )*( .49 - .15*.49 ) }}}
{{{ C = .49*25 + ( x - 25 )*( .85*.49 ) }}}
{{{ C = 12.25 + .4165*( x - 25 ) }}}
{{{ C = .4165x + 12.25 - 10.4125 }}}
{{{ C = .4165x + 1.8375 }}}
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check answer
If you buy 25 pounds:
{{{ C = .4165*25 + 1.8375 }}}
{{{ C = 10.4125 + 1.8375 }}}
{{{ C = 12.25 }}}
which is the same as no discount
{{{ C = .49*25 }}}
{{{ C = 12.25 }}}
OK