Unit 4 Review

Front

What is the equation to find the cost of an item when given total money spent and change received?

Back

The equation is: Total Money = Cost of Item + Change Received.

Front

If Tom has $13 and buys a bottle of water for $1.50, how do you express the cost of the book he bought?

Back

1.50 + b + 6.25 = 13; where b is the cost of the book.

Front

What does the equation 1.75g = 20 represent?

Back

It represents the total cost of gas purchased, where g is the number of gallons.

Front

How do you calculate the area of a rectangle?

Back

Area (A) = Length (L) x Width (W).

Front

If the area of Tom's room is 54.6 square meters and the width is 9.5 meters, how do you find the length?

Back

Use the formula: L = A / W; L = 54.6 / 9.5 = 5.747 meters.

Front

What does the inequality x ≥ 2 mean?

Back

It means x is greater than or equal to 2.

Front

How do you solve for a variable in an equation?

Back

Isolate the variable on one side of the equation using inverse operations.

Front

What is the significance of change received in a transaction?

Back

Change received is the amount returned after a purchase, indicating how much money was left after spending.

Front

What is the formula to find the number of gallons purchased if you know the total cost and price per gallon?

Back

g = Total Cost / Price per Gallon.

Front

What does the term 'inequality' refer to in mathematics?

Back

An inequality is a mathematical statement that compares two expressions, showing that one is greater than, less than, or equal to the other.