#### Study sets matching "formulas pre algebra"

#### Study sets matching "formulas pre algebra"

Arithmetic mean

Probability

Direct Proportionality

Inverse Proportionality

Sum of values/number of values

Target outcomes/total outcomes

Variables x and y are directly proportional when the followin…

Variables x and y are inversely proportional when the followi…

Arithmetic mean

Sum of values/number of values

Probability

Target outcomes/total outcomes

Area of a Triangle

Area of a Rectangle

Area of a Trapezoid

Area of a Parallelogram

1/2 bh... 1/2 x base x Height

lw... length x width

1/2 (b1+b2)h... 1/2 x sum of bases x height

bh... base x height

Area of a Triangle

1/2 bh... 1/2 x base x Height

Area of a Rectangle

lw... length x width

Percent of Change

Percent Error

Percent Proportion

Markup & Discount

amount of change ... ———————————... original amount

amount of error... —————————- x 100... actual value

is (or part)... --... of (or whole)

% × Whole... Example of Markup: ... Let m represent the amount of…

Percent of Change

amount of change ... ———————————... original amount

Percent Error

amount of error... —————————- x 100... actual value

formula for midpoint

formula for distance

Pythagorean Theorem

monomial

( average of x values , average of y values )

The square root of ( x2-x1)squared + (y2-y1)squared

a squared + b squared = c squared

a single term in which any exponent for a variable must be a…

formula for midpoint

( average of x values , average of y values )

formula for distance

The square root of ( x2-x1)squared + (y2-y1)squared

retail price

original amount

sales tax and tips

sale price

retail price= wholesale price+markup

retail price= wholesale (100% + markup percent)

total= food bill+ sales tax+ tip

sale price= original price- discount

retail price

retail price= wholesale price+markup

original amount

retail price= wholesale (100% + markup percent)

Adding integers: Same sign:

Adding integers: Different sign:

Subtracting integers: rule #1

Subtracting integers: rule #2

Keep it and add

Subract, then keep the sign of the larger number

Change the sign of the 2nd #

Follow rules of addition

Adding integers: Same sign:

Keep it and add

Adding integers: Different sign:

Subract, then keep the sign of the larger number