1st Semester Final Review

Front

What is the expression for the distance a seahorse dives at a rate of 18 inches per second for 10 seconds?

Back

The expression is -18(10), representing the distance as negative since it is diving deeper.

Front

If Cesar has $7.00 and each pack of gum costs $0.79, how many packs can he buy?

Back

Cesar can buy 8 packs of gum.

Front

What is the expression to calculate the total cost of bowling for x hours, given $5 for shoes and $2.50 per hour?

Back

The expression is 5 + 2.5x.

Front

How do you compare the rates of Tate and Janey if Tate ran 12 miles in 2 hours and Janey ran 10 miles in 2.5 hours?

Back

Tate’s rate per hour is greater than Janey’s rate per hour.

Front

What is the sum of -4.2 + 8.7 + (-3.1)?

Back

The sum is 1.4.

Front

Define a rate in the context of distance and time.

Back

A rate is a ratio that compares distance to time, often expressed as miles per hour (mph).

Front

What does it mean to write an expression in mathematics?

Back

Writing an expression means creating a mathematical phrase that represents a quantity or relationship using numbers, variables, and operations.

Front

How do you calculate the total cost of an item with a fixed cost and a variable cost per unit?

Back

Total cost = Fixed cost + (Variable cost per unit × Number of units).

Front

What is the formula to find the average speed?

Back

Average speed = Total distance / Total time.

Front

What is the significance of negative numbers in real-world contexts?

Back

Negative numbers can represent values below zero, such as debt, temperature below freezing, or depth below sea level.