grade 9 math exam flash cards
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44 Terms
What is the order of operations?
Brackets, Exponents, Division/Multiplication, Addition/Subtraction
What is an integer?
A whole number that can be positive, negative, or zero
What is the square root of 49?
7
What is a perfect square?
A number made by squaring a whole number (Ex: 1, 4, 9, 16, 25)
What is a rational number?
A number that can be written as a fraction (includes integers, decimals, fractions)
What is the opposite of -8?
+8
What is the slope formula?
(y2 - y1) / (x2 - x1)
What does slope represent?
The steepness or direction of a line
What is the formula for area of a triangle?
A = (base × height) ÷ 2
What is the formula for area of a rectangle?
A = length × width
What is the formula for the volume of a rectangular prism?
V = length × width × height
What is the formula for the circumference of a circle?
C = 2πr or C = πd
What is the formula for area of a circle?
A = πr²
What is an equation?
A math sentence that shows two expressions are equal
What is a linear relation?
A relationship that forms a straight line when graphed
What is the general form of a linear equation?
y = mx + b
In y = mx + b, what does m represent?
The slope
In y = mx + b, what does b represent?
The y-intercept
How do you solve for x in 2x + 5 = 11?
Subtract 5, then divide by 2 → x = 3
What is a like term?
Terms with the same variable and exponent (Ex: 3x and 5x)
What is the distributive property?
a(b + c) = ab + ac
What is the difference between expression and equation?
Expression has no equal sign; equation does
How do you find the mean?
Add all values and divide by the number of values
How do you find the median?
Put numbers in order and find the middle
How do you find the mode?
The number that appears most often
What is range in statistics?
The difference between the highest and lowest numbers
What is the order of operations?
Brackets, Exponents, Division/Multiplication, Addition/Subtraction
What is an integer?
A whole number that can be positive, negative, or zero
What is the square root of 49?
7
What is a perfect square?
A number made by squaring a whole number (Ex: 1, 4, 9, 16, 25)
What is a rational number?
A number that can be written as a fraction (includes integers, decimals, fractions)
What is the opposite of -8?
+8
What is the slope formula?
(y2 - y1) / (x2 - x1)
What does slope represent?
The steepness or direction of a line
What is the formula for area of a triangle?
A = (base × height) ÷ 2
What is the formula for area of a rectangle?
A = length × width
What is the formula for the volume of a rectangular prism?
V = length × width × height
What is the formula for the circumference of a circle?
C = 2πr or C = πd
What is the formula for area of a circle?
A = πr²
What is an equation?
A math sentence that shows two expressions are equal
What is a linear relation?
A relationship that forms a straight line when graphed
What is the general form of a linear equation?
y = mx + b
In y = mx + b, what does m represent?
The slope
In y = mx + b, what
The y-intercept
Note 
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