SAT Math Shit

Question 1

Quadratic Formula

Answer 1

x = [-b ± √(b² - 4ac)] / (2a)

Question 2

Slope Formula

Answer 2

(y₂- y₁) / (x₂- x₁)

Question 3

Explicit Arithmetic Sequence

Answer 3

An=A1+(n-1)d

Question 4

Explicit Geometric Sequence

Answer 4

An = A1 * r^n-1

Question 5

Percentages

Answer 5

part = (percent / 100) x whole

Question 6

Average

Answer 6

average = sum of terms / number of terms

Question 7

Average Speed

Answer 7

average speed = total distance / total time

Question 8

sum

Answer 8

sum = average x (number of terms)

Question 9

probability

Answer 9

probability = number of desired outcomes / number of total outcomes

Question 10

Multiplying exponencial terms

Answer 10

add exponents

Question 11

Exponencial term raised to another number

Answer 11

multiply exponents

Question 12

xº

Answer 12

1

Question 13

Roots

Answer 13

√(xy) = √x · √y

Question 14

Difference of Squares

Question 15

a² + 2ab + b²

Answer 15

(a+b)²

Question 16

a² - 2ab + b²

Answer 16

(a-b)(a-b)

Question 17

Distance Formula

Answer 17

√[(x₂- x₁)² + (y₂- y₁)²)]

Question 18

Area of Triangle

Answer 18

area = (1/2)bh

Question 19

Angles of Triangle

Answer 19

add up to 180 degrees

Question 20

Length of Triangle Sides

Answer 20

length of 1 side is always less than the sum of the other 2

Question 21

equilateral

Answer 21

three equal sides, all angles = 60 degrees

Question 22

Isosceles

Answer 22

2 equal sides, 2 equal angles

Question 23

Similar

Answer 23

Similar

Question 24

Length of Arc

Answer 24

(n degree / 360 degrees) · 2 · π · r

Question 25

Area of Sector

Answer 25

(n degree / 360 degrees) · π · r²

Question 26

Parallelogram Area

Answer 26

area = lh

Question 27

Special sin cos Relationship

Answer 27

sin²(angle) + cos²(angle) = 1

Question 28

Degree to Radian

Answer 28

degree# · (π / 180 degrees)

Question 29

Radian to Degree

Answer 29

radian# · (180 degrees / π)

Question 30

Point slope form

Answer 30

y - y₁= m(x - x₁)

Question 31

Dividing by a Negative Number in an Inequality

Answer 31

You must flip the sign

Question 32

Sector

Answer 32

The part of a circle that looks like a piece of pie. A sector is bounded by 2 radii and an arc of the circle.

Question 33

Arc

Answer 33

Part of a circle connecting two points on the circle.

Question 34

Central Angle

Answer 34

An angle whose vertex is the center of the circle

Question 35

Recursive Arithmetic Sequence

Answer 35

A1 = # An = A(n-1) + d

Question 36

Recursive Geometric Sequence

Answer 36

A1 = # An = r * A(n-1)