Formulas

Question 1

Percent Increase

Answer 1

amount of increase/base

Question 2

percent decrease

Answer 2

amount of decrease/base

Question 3

ca+cb

Answer 3

c(a+b)

Question 4

ca-cb

Answer 4

c(a-b)

Question 5

(a+b)^2

Answer 5

a2+2ab+b2

Question 6

a^2-b^2

Answer 6

(a+b)(a-b)

Question 7

(a+b)^3

Answer 7

a3-3a^2b+3ab^2+b^3

Question 8

X^-a

Answer 8

1/Xa

Question 9

(X^a)(X^b)

Answer 9

X^a+b

Question 10

X^a/X^b

Answer 10

X^a-b, 1/X^b-a if negative

Question 11

X^0

Answer 11

1

Question 12

(X^a)(Y^a)

Answer 12

(xy)^a

Question 13

(X^a/Y)

Answer 13

X^a/Y^a

Question 14

(X^a)^b

Answer 14

X^ab

Question 15

Quadratic formula

Answer 15

-b±√(b²-4ac))/(2a)

Question 16

Distance formula

Answer 16

d=rt

Question 17

simple annual interest

Answer 17

V=P(1+rt/100)

Question 18

P in interest formula

Answer 18

amount invested

Question 19

r in interest formula

Answer 19

percent

Question 20

annual interest compounded annually

Answer 20

V=P(1+r/100)^t

Question 21

annual interest compounded n times per year

Answer 21

V=P (1+r/100n)^nt

Question 22

quadrant 1

Answer 22

+,+

Question 23

Quadrant 2

Answer 23

-,+

Question 24

Quadrant 3

Answer 24

-,-

Question 25

Quadrant 4

Answer 25

+,-

Question 26

parallel lines on graph

Answer 26

slopes are equal

Question 27

perpendicualr lines on graph

Answer 27

slopes are negative reciprocals

Question 28

graph of circle

Answer 28

(x−a)^2+(y−b)^2=r2.

Question 29

center of circle

Answer 29

(a,b)

Question 30

h(x)+c

Answer 30

shifted up c units

Question 31

h(x)-c

Answer 31

shifted down c units

Question 32

h(x+c)

Answer 32

shifted left c units

Question 33

h(x-c)

Answer 33

shifted right c units

Question 34

the measure of interior angles of an n-sided polygon

Answer 34

(n-2)(180)

Question 35

equilateral triangle angles

Answer 35

60

Question 36

isoceles triangle

Answer 36

two congruenet sides, angles of sides are equal

Question 37

pythagorean theorem

Answer 37

C^2=A^2+B^2

Question 38

Area of triangle

Answer 38

A=bh/2

Question 39

Area of trapezoid

Answer 39

A=1/2(b1+b2)h

Question 40

circumference

Answer 40

C=2pir

Question 41

length of arc

Answer 41

length/C = Angle of arc/360

Question 42

area of circle

Answer 42

PiR^2

Question 43

Area of sector

Answer 43

S/piR^2 = angle of arc/360

Question 44

volume of rectangualr solid

Answer 44

V=lwh

Question 45

SA of rectangular solid

Answer 45

2(lw +lh +wh)

Question 46

Volume of cylinder

Answer 46

V= pir^2h

Question 47

SA of cylinder

Answer 47

2(pir^2) + 2pirh

Question 48

first quartile

Answer 48

Median of first half

Question 49

second quartile

Answer 49

median

Question 50

thrid quartile

Answer 50

median of second half

Question 51

interquatile range

Answer 51

q3-q1

Question 52

Permutations n objects taken r at a time

Answer 52

(n,r) = n! ÷ (n-r)!

Question 53

combinations

Answer 53

nCr = n! / r! * (n - r)!

Question 54

P(E or F)

Answer 54

P(E) + P(F) - P( E and F)

Question 55

P (E or F) mutually exculsive

Answer 55

P(E) + P(F)

Question 56

Independent P(E or F)

Answer 56

P(E)P(F)

Question 57

n-factorial

Answer 57

n! 1!= 1 2!= (2)(1) 3!= (3)(2)(1)