SAT Mathematics Exam Prep | Algebra, Geometry, Formulas & Practice Questions
slope difference btwn y / difference btwn x
(rise over run) (up/over)
-is a rate (not an average and it is not insignificant)
slope intercept form y=mx+b
point slope form y-y1=m(x-x1)
-use if given slope and 1 point (do not need to solve for x intercept)
lines that will never intersect are parallel
if given 1/(fraction) it equals the reciprocal of the fraction
if told to reflect a line on a graph pick a point not the whole line
slope = zero horizontal line parallel with x axis
-take form y=b
standard form of a linear equation Ax+By=c
-can not have fractions for the coefficient
-
order of operations pemdas
least common multiple smallest number that is multiple of 2+ numbers
-list multiples of the 2 numbers
10- 10 20 30 40 50
-start with number itself
greatest common factor largest number that goes into 2+ numbers
adding/subtracting fractions -find common denominator by using common multiple
-can multiply numbers
multiplying fractions -multiply straight across after simplifying fractions
-simplify by putting all numbers on one line, cancelling out numbers before
multiplying
dividing fractions -invert second number and multiply
, SAT Mathematics Exam Prep | Algebra, Geometry, Formulas & Practice Questions
factoring -pull out common factors
factor quadratics ax^2+bx+c
b= ? + ?
c= ? x ?
solving systems of equations elimination
substitution solve for one variable and put into second equation and solve
undefined slope vertical line
f(x) means that y is a function of x, so basically as x changes y changes
-fancy way of saying y
when to use calculator long division, extensive calculations
-graph quadratics
-simplify calculators and square roots
when not to use calculator -when faster to do calculation in head
-requires strategic thinking not calculator
when squaring a number in parenthesis can not just distribute the squared must multiply
words meaning equal to -was, will be, has, costs, adds up to, the same as, as much as
multiplication product of, multiplied by, twice, double, by
divided divided, per, ratio, out
addition plus, added, sum, combined, total, increased by
minus subtracted from, smaller than, less than, fewer, decreased by, difference
between
slope difference btwn y / difference btwn x
(rise over run) (up/over)
-is a rate (not an average and it is not insignificant)
slope intercept form y=mx+b
point slope form y-y1=m(x-x1)
-use if given slope and 1 point (do not need to solve for x intercept)
lines that will never intersect are parallel
if given 1/(fraction) it equals the reciprocal of the fraction
if told to reflect a line on a graph pick a point not the whole line
slope = zero horizontal line parallel with x axis
-take form y=b
standard form of a linear equation Ax+By=c
-can not have fractions for the coefficient
-
order of operations pemdas
least common multiple smallest number that is multiple of 2+ numbers
-list multiples of the 2 numbers
10- 10 20 30 40 50
-start with number itself
greatest common factor largest number that goes into 2+ numbers
adding/subtracting fractions -find common denominator by using common multiple
-can multiply numbers
multiplying fractions -multiply straight across after simplifying fractions
-simplify by putting all numbers on one line, cancelling out numbers before
multiplying
dividing fractions -invert second number and multiply
, SAT Mathematics Exam Prep | Algebra, Geometry, Formulas & Practice Questions
factoring -pull out common factors
factor quadratics ax^2+bx+c
b= ? + ?
c= ? x ?
solving systems of equations elimination
substitution solve for one variable and put into second equation and solve
undefined slope vertical line
f(x) means that y is a function of x, so basically as x changes y changes
-fancy way of saying y
when to use calculator long division, extensive calculations
-graph quadratics
-simplify calculators and square roots
when not to use calculator -when faster to do calculation in head
-requires strategic thinking not calculator
when squaring a number in parenthesis can not just distribute the squared must multiply
words meaning equal to -was, will be, has, costs, adds up to, the same as, as much as
multiplication product of, multiplied by, twice, double, by
divided divided, per, ratio, out
addition plus, added, sum, combined, total, increased by
minus subtracted from, smaller than, less than, fewer, decreased by, difference
between
