12/5 7A-Equations, Tax, Percent and other stuff

Front

What is sales tax?

Back

Sales tax is a percentage of the purchase price that is added to the total cost of goods and services. It is collected by the seller and paid to the government.

Front

How do you calculate the total cost including sales tax?

Back

To calculate the total cost including sales tax, multiply the purchase price by the sales tax rate (as a decimal), then add that amount to the original price. Formula: Total Cost = Price + (Price × Sales Tax Rate).

Front

What is the formula for finding a percentage of a number?

Back

To find a percentage of a number, multiply the number by the percentage (as a decimal). Formula: Percentage of a Number = Number × (Percentage / 100).

Front

What does the inequality symbol '<' mean?

Back

The symbol '<' means 'less than'. It indicates that the value on the left side is smaller than the value on the right side.

Front

How do you solve the inequality 6(n + 2) < -72?

Back

First, distribute 6: 6n + 12 < -72. Then, subtract 12 from both sides: 6n < -84. Finally, divide by 6: n < -14.

Front

What is 13% of 78?

Back

To find 13% of 78, multiply 78 by 0.13: 78 × 0.13 = 10.14.

Front

What does the symbol '≥' mean in inequalities?

Back

The symbol '≥' means 'greater than or equal to'. It indicates that the value on the left side is either greater than or equal to the value on the right side.

Front

How do you match a graph with its inequality?

Back

To match a graph with its inequality, analyze the graph's shading and boundary line. The shading indicates the solution set, while the boundary line shows whether the inequality is strict (< or >) or inclusive (≤ or ≥).

Front

What is the sales tax on a $990 T.V. with a 9% tax rate?

Back

To find the sales tax, multiply $990 by 0.09: $990 × 0.09 = $89.10.

Front

What is the total cost of a $990 T.V. including 9% sales tax?

Back

Total Cost = $990 + ($990 × 0.09) = $990 + $89.10 = $1079.10.