7th Grade STAAR Math Review

Front

What is an inequality?

Back

An inequality is a mathematical statement that shows the relationship between two expressions that are not equal, using symbols like <, >, ≤, or ≥.

Front

How do you write an inequality for a budget constraint?

Back

To write an inequality for a budget constraint, express the total cost of items as less than or equal to the budget. For example, if you have a budget of $40 and you spend $10 on one item and $7 on each additional item, the inequality would be: 10 + 7c ≤ 40.

Front

What is the formula for calculating simple interest?

Back

The formula for calculating simple interest is I = PRT, where I is the interest, P is the principal amount, R is the rate of interest per year, and T is the time in years.

Front

How do you calculate sales tax?

Back

To calculate sales tax, multiply the purchase price by the sales tax rate. For example, if the sales tax rate is 6% and the item costs $420, the sales tax is 420 * 0.06 = $25.20.

Front

What is the area of a rectangle?

Back

The area of a rectangle is calculated by multiplying its length by its width. Area = length × width.

Front

What is the significance of the shaded region in geometry problems?

Back

The shaded region often represents the area of interest in a geometry problem, which may need to be calculated or compared to other areas.

Front

How do you determine the remaining budget after expenses?

Back

To determine the remaining budget after expenses, subtract the total expenses from the initial budget. Remaining Budget = Initial Budget - Total Expenses.

Front

What does it mean to solve an inequality?

Back

To solve an inequality means to find all values of the variable that make the inequality true, often resulting in a range of possible solutions.

Front

What is the total cost if you buy multiple items?

Back

The total cost is calculated by multiplying the number of items by the cost per item. Total Cost = Number of Items × Cost per Item.

Front

How do you find the total interest paid on a loan?

Back

To find the total interest paid on a loan, use the simple interest formula I = PRT, where P is the principal, R is the interest rate, and T is the time in years.