College Algebra 7th Edition

Published by Brooks Cole
ISBN 10: 1305115546
ISBN 13: 978-1-30511-554-5

Chapter P, Prerequisites - Section P.1 - Modeling the Real World with Algebra - P.1 Exercises: 19

Answer

19 (a) 15 (b) C = p + (n × $1) (c) n = 4 toppings

Work Step by Step

19 (a) The cost of a 3-topping pizza is $$12 + (3 × $1)$. Which is equal to $15. (b) C - cost of pizza p - price of plain pizza n - number of toppings Therefore C = p + (n × $1) (c) C = $16 p = $12. n = ? C = p + (n × $1) $16 = $12 + (n × $1) $16 - $12 = $12 - $12 + n × $1. (Subtract $12 from both sides of the equation) $4 = n × $1 $\frac{$4}{$1} = n$ n = 4
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