Dixon--PreAlg Final Review

Front

How do you write a number in scientific notation?

Back

To write a number in scientific notation, express it as a product of a number between 1 and 10 and a power of 10. For example, 564,000,000 is written as 5.64 x 10^8.

Front

What is the formula to find the slope of a line?

Back

The slope (m) of a line is calculated using the formula m = (y2 - y1) / (x2 - x1), where (x1, y1) and (x2, y2) are two points on the line.

Front

What does a negative slope indicate about a line?

Back

A negative slope indicates that as the x-values increase, the y-values decrease, meaning the line goes down from left to right.

Front

Solve for x: 4x = 72

Back

x = 18.

Front

What is a system of equations?

Back

A system of equations is a set of two or more equations with the same variables. The solution is the point(s) where the equations intersect.

Front

How do you find the slope of a line given two points?

Back

Use the formula m = (y2 - y1) / (x2 - x1) to calculate the slope.

Front

What is the solution to the system of equations: -4x - 2y = -2 and 5x + 2y = 4?

Back

The solution is (2, -3).

Front

What is scientific notation?

Back

Scientific notation is a way of expressing very large or very small numbers using powers of ten.

Front

What does the term 'intercept' refer to in a graph?

Back

An intercept is the point where a line crosses the x-axis or y-axis.

Front

How do you convert a fraction to a decimal?

Back

To convert a fraction to a decimal, divide the numerator by the denominator.