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=

is, was, has, cost

of

×

percent

/ division

x/100

x% =

which, what

x (or any other variable)

x and y

x + y

x + y

the sum of x and y

x − y

the difference between x and y

y + x

x more than y

y − x

x less than y

xy

the product of x and y

x²

the square of x

x is greater than y

x > y (y < x)

x is less than y

x < y (y > x)

− y

y years ago

+ y

y years from now

c × (Jenny's age)

c times as old as Jenny

y + x

x older than y

y − x

x younger than y

y − x

the increase from x to y

x − y

the decrease from x to y

((y − x)/x)100

the percent increase from x to y (y > x)

((x − y)/x)100

the percent of decrease from x to y (x > y)

the percent of increase

(amount of increase/original amount)100

the percent of decreas

(amount of decrease/original amount)100

x + (n/100)x

n percent greater than x

x - x(n/100)

n percent less than x

vector

the direction or course followed by an airplane, missile, or the like

Isometry

a transformation that does not change the size or shape of a figure

Pre-image

the original figure BEFORE a transformation is performed on it

image

the resulting figure AFTER a transformation is performed on it

translation

It is a transformation that moves points the distance and in the same direction.

orientation

the direction in which an figure is facing

Transformation

a movement on the cartesian plane