91Ó°ÊÓ

A company that produces DVDs has found that revenue from sales of DVDs is \(\$ 5\) per DVD, less sales costs of \(\$ 100 .\) Production costs are \(\$ 125,\) plus \(\$ 4\) per \(D V D .\) Profit \((P)\) is given by revenue \((R)\) less cost \((C),\) so the company must find the production level \(x\) that makes \(P>0, \quad\) that is, \(\quad R-C>0 . \quad P=R-C\). Write an expression for revenue \(R,\) letting \(x\) represent the production level (number of DVDs to be produced).

Solve each problem. \(18 \%\) of 780 is what number?

Solve each formula for the specified variable. \(y=m x+b\) for \(m\)

Solve each equation, and check the solution. \(-2(8 p+2)-3(2-7 p)-2(4+2 p)=0\)

Solve each problem. \(23 \%\) of 480 is what number?

Solve each formula for the specified variable. \(y=m x+b\) for \(x\)

A company that produces DVDs has found that revenue from sales of DVDs is \(\$ 5\) per DVD, less sales costs of \(\$ 100 .\) Production costs are \(\$ 125,\) plus \(\$ 4\) per \(D V D .\) Profit \((P)\) is given by revenue \((R)\) less cost \((C),\) so the company must find the production level \(x\) that makes \(P>0, \quad\) that is, \(\quad R-C>0 . \quad P=R-C\). Write an expression for production costs \(C\) in terms of \(x\).

Solve each formula for the specified variable. \(A x+B y=C\) for \(y\)

\(4(7 x-1)+3(2-5 x)-4(3 x+5)=-6\)

Solve each problem. \(42 \%\) of what number is \(294 ?\)