Vocabulary 1
The number in front of a variable in a term
A coefficient
Changing the position, size or orientation of shapes on a coordinate plane.
Transformation
The horizontal line on the coordinate plane.
x axis
Solve for x. Explain your solution.
x - 7 = 21
To solve for x, I add 7 to both sides of the equation. The solution is x equals 28.
A letter that represents an unknown value
A variable
A math phrase that includes numbers, letters and operations signs but no equal sign
An expression
The original figure before transformation is called ...
The pre-image
The vertical line on the coordinate plane.
y axis
Solve for y. Explain your solution.
y + 12 = 39
To solve for y, I subtract 12 from both sides of the equation. The solution is y equals 27.
A mathematical phrase that shows that two expressions are equal.
An equation
What is the inverse of multiplication?
Division
The figure after the transformation is called ...
The image
Turning a figure around a fixed point.
Rotation
Solve for x. Explain your solution.
3x=24
To solve for x, I divide both sides by 3. The solution is x equals 8.
Operations that undo / reverse each other
Inverse operations
Getting a variable alone on one side of the equation.
Isolate
Sliding a figure right or left, up or down on the coordinate plane
Translation
Two figures that have the same shape and size are ....
congruent figures.
Solve for m. Explain your solution.
4m + 8 = 68
To solve for m, first, I subtract 8 from both sides. The result is 4m = 60. Then, I divide both sides by 4. The solution is m equals 15.
The answer to the problem
The solution
The terms that have the same variable to the same degree.
Like terms
Flipping a figure on a line on the coordinate plane.
Reflection
Two figures that have the same shape but different sizes
Similar figures
Solve for x. Explain your solution.
2/5x - 6 = 14
To solve for x, first, I add 6 to both sides. The result is 2/5x = 20. Then, I multiply both sides by 5 and I get 2x=100. Finally, I divide both sides by 2. The solution is x equals 50.
A part of an expression that is separated by + or -
A term