STAAR Math Review

Front

What is the formula for calculating simple interest?

Back

Simple Interest = Principal × Rate × Time

Front

How do you isolate a variable in an equation?

Back

To isolate a variable, perform inverse operations on both sides of the equation until the variable is alone.

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 find the slope of a line given two points (x1, y1) and (x2, y2)?

Back

Slope (m) = (y2 - y1) / (x2 - x1).

Front

What does it mean for an equation to be in standard form?

Back

An equation is in standard form if it is written as Ax + By = C, where A, B, and C are integers.

Front

How do you convert a percentage to a decimal?

Back

To convert a percentage to a decimal, divide by 100.

Front

What is the relationship between the principal, interest rate, and time in a simple interest problem?

Back

The total interest earned is directly proportional to the principal amount, the interest rate, and the time period.

Front

How do you set up an equation to solve for an unknown in a word problem?

Back

Identify the unknown, define it with a variable, and translate the problem's conditions into an equation.

Front

What is the formula to calculate the total cost of a car after a down payment and monthly payments?

Back

Total Cost = Down Payment + (Monthly Payment × Number of Months).

Front

How do you solve a one-variable equation?

Back

Use inverse operations to isolate the variable on one side of the equation.