7th Math Midterm Review Flashcard

Front

What is percent change and how is it calculated?

Back

Percent change is a measure of how much a quantity has increased or decreased relative to its original value. It is calculated using the formula: Percent Change = ((New Value - Old Value) / Old Value) * 100.

Front

How do you calculate the total cost of multiple items including delivery?

Back

To calculate the total cost, multiply the cost of each item by the quantity purchased, then add any additional costs such as delivery fees. For example, if each item costs $1179.95 and 4 items are purchased, the total cost is (4 * $1179.95) + Delivery Fee.

Front

What is the formula to find change from a payment?

Back

Change = Amount Paid - Total Cost. For example, if you pay $20 for an item that costs $6.41, the change is $20 - $6.41 = $13.59.

Front

What is the slope-intercept form of a linear equation?

Back

The slope-intercept form is y = mx + b, where m is the slope and b is the y-intercept.

Front

How do you determine the total number of items in a collection over time?

Back

To find the total number of items in a collection over time, use the formula: Total Items = Initial Items + (Rate of Increase * Time). For example, if you start with 20 cards and add 30 each month, after 1 month you have 20 + (30 * 1) = 50 cards.

Front

What does a 50% increase in attendees mean?

Back

A 50% increase means that the new number of attendees is 1.5 times the original number. For example, if there were originally 100 attendees, a 50% increase would result in 100 + (0.5 * 100) = 150 attendees.

Front

How do you interpret a table of values in relation to a linear function?

Back

A table of values shows the relationship between two variables, typically x and y. Each row represents a pair of values, and if the relationship is linear, the change in y will be consistent for equal changes in x.

Front

What is the significance of the y-intercept in a linear equation?

Back

The y-intercept is the point where the line crosses the y-axis, representing the value of y when x is 0. It provides a starting point for the linear relationship.

Front

How do you find the total cost of items with sales tax?

Back

To find the total cost including sales tax, use the formula: Total Cost = Item Cost + Sales Tax. If an item costs $10 and the sales tax is $0.45, the total cost is $10 + $0.45 = $10.45.

Front

What is the meaning of 'x' and 'y' in a coordinate plane?

Back

In a coordinate plane, 'x' represents the horizontal axis and 'y' represents the vertical axis. Each point is defined by an ordered pair (x, y), indicating its position relative to these axes.