Define algebra.
A branch of mathematics dealing with symbols and the rules for manipulating those symbols.
What is the quadratic formula?
The formula x = (-b ± √(b²-4ac)) / 2a used to solve quadratic equations.
True or false: The Pythagorean theorem applies to all triangles.
FALSE
It only applies to right-angled triangles.
Fill in the blank: The slope of a line is calculated as _______.
rise over run
What is a function?
A relation that assigns exactly one output for each input.
Define mean.
The average of a set of numbers, calculated by dividing the sum by the count.
What does SD stand for in statistics?
Standard Deviation, a measure of the amount of variation in a set of values.
True or false: A prime number has exactly two distinct positive divisors.
TRUE
Fill in the blank: The area of a rectangle is calculated as _______.
length times width
What is the discriminant in a quadratic equation?
The value b² - 4ac that determines the nature of the roots.
Define perimeter.
The total distance around the outside of a polygon.
What is the sine of an angle in a right triangle?
The ratio of the length of the opposite side to the hypotenuse.
True or false: The sum of angles in a triangle is always 180 degrees.
TRUE
Fill in the blank: A circle’s circumference is calculated as _______.
2πr
What is probability?
The measure of the likelihood that an event will occur.
Define median.
The middle value in a data set when arranged in order.
What is a composite number?
A positive integer that has at least one positive divisor other than one or itself.
True or false: The mode is the most frequently occurring number in a data set.
TRUE
Fill in the blank: The volume of a cube is calculated as _______.
side³
What is the hypotenuse?
The longest side of a right triangle, opposite the right angle.
Define ratio.
A relationship between two quantities, showing how many times the first number contains the second.
What is a linear equation?
An equation that makes a straight line when graphed.
True or false: The x-intercept is where a graph crosses the y-axis.
FALSE
It crosses the x-axis.