Sat-Act-Success Math Formula Sheet Page 2
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1
2Vertex Form of a Parabola
%
W 5 = 8 5 − ℎ
+ @
where (ℎ, @) is the vertex of the parabola
Compound Growth Formula
Y
! = X 1 + $
where A = Annual Interest, P = Principle (the amount you start with), 1 = 100% of
the Principle, r = the interest rate (i.e. 5% = 0.05), and t = time (i.e. # of years)
Compound Decay Formula
Y
! = X 1 − $
where A = Annual Interest, P = Principle (the amount you start with), 1 = 100% of
the Principle, r = the interest rate (i.e. 5% = 0.05), and t = time (i.e. # of years)
Percent
Z[\]
D
=
^_`ab
)cc
Probability
^[m]
probability =
]`][a
Ratios
Z[\]
Z[\]
Always add the parts of a ratio to determine the total sum of the parts.
(i.e. If there are 2 brown eggs and 3 white eggs, there are 5 eggs total.)
Combinations / Permutations
(Basic) 5 Men and 5 Available Bus seats – how many combinations of seating
)
)
)
)
)
)
arrangements?
⋅
⋅
⋅
⋅
=
n
2
3
%
)
)%c
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