# math

## what is the order of operations?

pemdas: parentheses, exponents, (multiplication, division), (addition, subtraction)

## a=b/c, what are b and c?

b=ac, c=b/a

## what is an absolute value?

it's distance from 0

## formula for percent of change

((NN - ON)/ON) * 100

## what is the formula for a discount?

Discount=OriginalNumber*RateOfDiscount

## what is the formula for simple interest?

interest=principal*rate*time

## what is distrubutive property?

a(b+c) = ab+ac

## what are irrational numbers?

numbers that cant be expressed as a fraction

## what are the atributes of irrational numbers?

non-repeating non-terminating decimal. no exact place on number line

## how do you approcimate rational numbers? sqrt

sqrt y: x < y < z (x and z = closest perfect square). outcome closest to y