SAT MATH (copy)

1 solution

b2 minus 4 ac

b/2a

c - b^2/4a

no solution

2 solutions

where parabola opens; c = y int

parabola opens up

parabola opens down

x intercepts

vertex

ax^2 + bx + c

a(x-h)^2 + k, where (h, k) are the vertex coordinates

a(x-b)(x-c)

right c units

left c units

up c units

down c units

y-value

x-value

y=mx+b

x, xroot3, 2x

x, x, xroot2

d = √[( x₂ - x₁)² + (y₂ - y₁)²]

x = -b ± √(b² - 4ac)/2a

(a^2 + 2ab +b^2)

a^2 -2ab +b^2

(x+ y) (x-y)

x^12 (sutbract exponents when dividing w/ same base)

x^7 (sum exponents when multiplying with same base)

x^12 (multiply exponents when one is outside the parentheses)

1/x^n (negative exponent is same as 1/x to that exponent’s abs value)

cube root of x^2 (numerator is power x is raised to, denominator is root)

cube root rulez

current balance = principal * (1 + (interest rate/number of times compounded)^(time)(# times copounded)

Interest paid on interest previously earned; credited daily, monthly, quarterly or semiannually

A sum paid or charged for the use of money or for borrowing money

SI = P × R × T, where P = Principal, R = Rate of Interest, and T = Time period

sohcahtoa

(x-h)^2 + (y-k)^2 = r^2

A=πr²

C=2πr

radians x 180/π

multiply by pi/180

parallel lines/ no solution

infinite solutions same line

one solution

(x,y) -> (x,-y)

(x,y) -> (-x,y) (reflection)

V = πr2h

1- pithagoras- r triangles 2- sohcatoa - r triangles 3- circles: remember formulas and rules, apply x/2x strat equalling to total same with any shape^^

a modification of y=x

old-new/old x 100

check for what the problem is telling u: equilateral, isosceles

same ratios! --corresponding angles,etc

2 triangles are congruent if and only if all pairs of corresponding sides and angles are congruent / equals. rotate and match to find angle

dot inside both shaded regions (desmos)

all terms===

-b/a

c/a

same m dif b // A/D=B/E=// C/F

same everything A/D=B/E

dif m's A/Ddoesnt= B/E

square every term

root every term

parabolas are symmetrical// vertex is in middle of 2 numbers //h=-3 beware of signs

-b/2a or discriminant

variable on the left== flip sign

wrong usually; redo

slow down to get #'s right

flip signs

same or greater than symbol

part of whole times total

Two pairs of corresponding angles are equal. : Three pairs of corresponding sides are proportional. : Two pairs of corresponding sides are proportional and the corresponding angles between them are equal.

always on left side of equation, if switched = swap signn means less than or greater than

≥c

≤c

≤c

≥c

set up an annotate (SIMPLY AND UNDERSTAND) totals signs- equations signs totals!!-- annotate which units are beingg x2 identify well!! LOCATE/CREATE IS** solve if necessary

money amount *usually identified when given 2 or even more totals!

apply formulas accordingly eg sum/amt

speed x time set proportions accordingly

plug in values in equation till u reach max based of data

SOLVE FOR 1 PLUG IN EG X= (Y-2) use results and plug in maximixing one value and minimizing the other or vice versa

A comparison of two quantities by division part to part part to whole

comparison of 2 ratios usually for an unknown value

result of the division of a ratio 15m/3s = 5m/s!! it combines 2 units

total price/ units

distance/time

find ratios unit conversion total? estequiometria set up lin equations sometimes careful of square units

plug in to make it 0!!

A=21​θr2 in radians no degrees

s=rθ in radians ofc!

the answers might be divided by 100 dont get confused what do these numbers mean?? leave those time consuming questions for end

solutions of a factored form equation

not 2x checking for a few secs leaving time consuming questions for beginning thinking and mentalizing there is not enough time== there is== not checking all at the end and just running out of time

solution: do mocks and mini sections ! ! ! !

usally complex units are ratios instead// total unitsx average makes no sense

total/unit times measurement

central angle/circular angle= sector area/circular area orrr circumference (ratio of 1 = ratio of other, ratio of other=) also central angle is same as its arc