91Ó°ÊÓ

A CD player has a pre-sale price of \(\$ c\). Kim buys it at a \(30 \%\) discount and pays \(6 \%\) sales tax. After a few months, she sells it for \(\$ d\) which was \(50 \%\) of what she paid originally. Express \(d\) as a function of \(c\).

Find each percent of change. Round to the nearest tenth, if necessary. Then state whether the percent of change is a percent of increase or a percent of decrease. from \(\$ 56\) to \(\$ 49\)

Determine whether each relation or equation is linear. Justify your answer. $$3 x+y=20$$

A CD player has a pre-sale price of \(\$ c\). Kim buys it at a \(30 \%\) discount and pays \(6 \%\) sales tax. After a few months, she sells it for \(\$ d\) which was \(50 \%\) of what she paid originally. How much did Kim sell it for if the pre-sale price was \(\$ 50 ?\)

Solve each equation. $$-205+t=-118$$

Find each percent of change. Round to the nearest tenth, if necessary. Then state whether the percent of change is a percent of increase or a percent of decrease. from 110 mg to 165 mg

Solve each equation. $$-350+z=125$$

A CD player has a pre-sale price of \(\$ c\). Kim buys it at a \(30 \%\) discount and pays \(6 \%\) sales tax. After a few months, she sells it for \(\$ d\) which was \(50 \%\) of what she paid originally. How much did Kim sell it for if the pre-sale price was \(\$ 50 ?\)

Determine whether each relation or equation is linear. Justify your answer. $$y=x^{2}$$

Simplify. $$2(18)-1$$