#### Answer

a. $C=10+0.20(m)$
b. $C=50 dollars$
c. $m=135 minutes$

#### Work Step by Step

a. $C=cost$
$C=10+0.20(m)$
b. $m=200$
$C=10+0.20(200)$
$C=10+40$
$C=50$
c. $C=37$
$37=10+0.20(m)$
$37-10=0.20(m)$
$27=0.20(m)$
$27\div0.20=m$
$m=135$

Published by
Brooks Cole

ISBN 10:
0-53449-636-9

ISBN 13:
978-0-53449-636-4

a. $C=10+0.20(m)$
b. $C=50 dollars$
c. $m=135 minutes$

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