Question

Sally ordered some pizzas to be delivered the bill for the pizza was m dollars sally tipped the deliverer 15% of the bill

Answer 1

A) 1.15m dollars

B) $\frac{x}{30}$ = 15%/100% (cross multiply)

   $\frac{100x}{100} =\frac{450}{100}$

    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.  :)

Answer 2

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!