Maria has 4 + 5 = <<4+5=9>>9 quarters.
The number of dollars from the quarters is 9 * $0.25 = $<<9*0.25=2.25>>2.25
The number of dollars from the dimes is 4 * $0.10 = $<<4*0.10=0.40>>0.40
The number of dollars from the nickels is 7 * $0.05 = $<<7*0.05=0.35>>0.35
The total number of dollars is $2.25 + $0.40 + $0.35 = $<<2.25+0.40+0.35=3>>3
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