A) 1.15m dollars
B) = 15%/100% (cross multiply)
x=$4.40
$30.00+4.50
=S34.50
These are correct answers because I using Math in Focus Singapore Math by Marshall Cavendish (Grade 7). The back page has answers about your question. :)
The expression would be: m + 0.15m and to know how much she paid I believe it would be 26.09 (rounded)
Hope it helped!
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