Question 758567


{{{R(x)= 30x}}}
{{{C(x)= 0.1x^2+7x+400}}}......you forgot {{{x}}} here {{{0.1(squared 2)}}}

{{{P(x)= R(x)- C(x)}}}...substitute {{{R(x)}}} and {{{C(x)}}}

{{{P(x)= 30x- (0.1x^2+7x+400)}}}

{{{P(x)= 30x- 0.1x^2-7x-400}}}

{{{P(x)= -0.1x^2+23x-400}}}