Question 1151309


Company {{{A }}}
Flat rate of ${{{3}}} plus {{{7}}} cents per word.

{{{f(x)=7x+3}}}

Company {{{B}}}

Flat rate of ${{{1.50}}} plus {{{12}}} cents per word.

{{{f(x)=12x+1.50}}}


If an advertisement contains {{{x}}} number of words, for what values of {{{x}}} is Company {{{A}}}’s rates cheaper than Company {{{B}}}?

yes, Company {{{A}}}’s rates cheaper than Company {{{B}}}: price per word= {{{7}}} is less than price per word={{{12}}} 


check:
Company A : if number of words is {{{x=10}}},{{{x=30}}},
{{{f(x)=7*10+3=73}}}
{{{f(x)=7*30+3=213}}}

Company B:if {{{x=10}}},{{{x=30}}}

{{{f(x)=12*10+1.50=121.50}}}
{{{f(x)=12*30+1.50=361.50}}}