Duc- Math/English equations and rules for SAT memorize

Center of Circle Equation

(x - h)² + (y-k)²

Arc angle equals center circle angle

The angle formed by an arc at the circumference of a circle is equal to the angle formed by the same arc at the center of the circle.

Find C in completing the sqaure

(b/2)² = c

X - coordinate of the vertex

-b/2a

standard deviation

how far away data points are from the mean ( close is less deviation and vice vers)

Mode

the value that appears most frequently in a data set

Isosceles triangle

Two angles are the congruent

Isosceles Right Triangle

Angles 45/45/90 equals side length s/s/s√2

Sum of all solutions

-b/a

product of solutions

c/a

discriminate

b² - 4ac; if greater than 0 = 2 solution, is 0 = 1 solution, less than 0 = no solution

Linear Standard From

Ax + By = C

Slope in Linear Standard Form

-A/B

Y intercept in Linear Standard Form

C/B

Linear No Solution

Parrell Lines with same slope but different y intercept

Perpendicular

Intersects at one point, slopes are negative reciprocals

Linear Infinitely many solutions

same slope and y intercept

Exponential Decay

A = Pk^x; k is greater than 1 = growth, less than one is decay

Gerund or present participle

Verbs - ing are nouns

Pronoun

Replace Nouns

FANBOYS

For And Nor But Or Yet So

Pronoun

Replace Noun

Preposition

Time and location, followed by nouns

Conjunctive Adverb

Adverb that links two independent clauses together either semicolon before and comma after, at the beginning of the sentence, or the middle .

Them

direct object

Verb - ed beginning a phrase

Introductory Phrase - dependent.

Pronoun + of which

fragment

Who

Subject for people

Whom

Object for people

Whoose

Possessive for people

Which

non- restrictive clause set off by commas for animals/things/ideas

That

restrictive clause (no commas needed) for animals/things/ideas

Relative Pronouns

who, whom, which, that, whose

Relative Clause

Type of subordinating clause that provides additional information about a noun using relative pronouns

Past participle

adding ed or n to a verb

Participial phrases stand alones

Dependent clauses