SAT NOTES
,M Gf h Mr =
important formula to know
always check answers
that involve
fraction
x in a
root
.
/ value /
,
or
☆
remember there are
useful formulas at
the of math
beginning
☆
sections
,F
1. Exponents & Radicals
Exponent Laws x '=x 31--3 SAT also tests on simply ing square roots .
factor out the number inside & ta
Out pairs
0--1 30=1
.
✗
for xm >cn=xm+n 34-35--39 48=2.2 2.2.3 =
(2. 2) (2.213--2-23=453
*
equations
-
.
. . .
7cm "
to go backwards take the number outside & put it back in
ALWAYS CHECK = >cm
-
n
=3 ,
as a pair
µ
SOLUTIONS !
4cm /h=xmn (3214=38 6 2 = 2- ( 6. 6) =
72
tryin xmym __ 12.313=23×33
to simplify a cube root takeout triplets
i¥M=¥mi÷i=÷
.
316 =3 (2.2-2)-2=232
x_m=÷m 3-4=34
2. Percent -
when you don't know the total # ofsmth ,
use 100 to makeup total
% of total find total of all after percentage & divide
by total
if 1. ↑
-
if -
1. ↓
Series of % change let P' be
'
original price then . finat-pxixio.liio.gl NEVER calculate the changes at each step
string the changes together to get the final res
Compound Interest compound interest he the account 't timeframe
'
an x 1. -
means earns >ii. on once a
↳ not from but 3% of what is in account
total accum -_ Pll -1×51 iaf ,
✗ gains
new " " " " "ᵈ """
"'"
change ↑ /↓ % change change is always based original value positive 1. increas
__
% %
'
__
on
old value
negative 1. decrea
-
__
↳ less looses
,
3. Exponential us .
Linear Growth infixes :/ ifieftwit
too -
i.
Tva/ ueorl.sc/.tvalueor
Exponential Growth
yooo .im#oftimeperiod
-
×
)tÉif
tim
'
>'
every
& Decay when a quantity grows periodically by a factor / final quant
__
initial /growth period
'
shrinks
✓
if it > ,
use
k&t must have the t this wil
Linear Growth growth __ linew positive slope '
y=mx+b / linearis consistent a
same unit
Égive ev
rate of change from initial period
y=-mx+b /
✗
&
Decay decay rrrnegative -
Associations both decays have a negative association between two things .
as one thing ↑ ,
the other t
'
-
growths ~ positive mur mur
a strong association -4 -
occurs when data points are close to forming a line .
4. Rates
'◦◦ ¢
Conversion Factors multipliers to help go from one set of units to another e. g. $1
•
setup the right sequence inappropriate numerators & denominators
5. Ratio & Proportion
Ratios there arefor every 2x
2x :y= there is ly this can be expressed as
2"
,
y
.
•
similar to rates this is , basically a conversion factor
,M Gf h Mr =
important formula to know
always check answers
that involve
fraction
x in a
root
.
/ value /
,
or
☆
remember there are
useful formulas at
the of math
beginning
☆
sections
,F
1. Exponents & Radicals
Exponent Laws x '=x 31--3 SAT also tests on simply ing square roots .
factor out the number inside & ta
Out pairs
0--1 30=1
.
✗
for xm >cn=xm+n 34-35--39 48=2.2 2.2.3 =
(2. 2) (2.213--2-23=453
*
equations
-
.
. . .
7cm "
to go backwards take the number outside & put it back in
ALWAYS CHECK = >cm
-
n
=3 ,
as a pair
µ
SOLUTIONS !
4cm /h=xmn (3214=38 6 2 = 2- ( 6. 6) =
72
tryin xmym __ 12.313=23×33
to simplify a cube root takeout triplets
i¥M=¥mi÷i=÷
.
316 =3 (2.2-2)-2=232
x_m=÷m 3-4=34
2. Percent -
when you don't know the total # ofsmth ,
use 100 to makeup total
% of total find total of all after percentage & divide
by total
if 1. ↑
-
if -
1. ↓
Series of % change let P' be
'
original price then . finat-pxixio.liio.gl NEVER calculate the changes at each step
string the changes together to get the final res
Compound Interest compound interest he the account 't timeframe
'
an x 1. -
means earns >ii. on once a
↳ not from but 3% of what is in account
total accum -_ Pll -1×51 iaf ,
✗ gains
new " " " " "ᵈ """
"'"
change ↑ /↓ % change change is always based original value positive 1. increas
__
% %
'
__
on
old value
negative 1. decrea
-
__
↳ less looses
,
3. Exponential us .
Linear Growth infixes :/ ifieftwit
too -
i.
Tva/ ueorl.sc/.tvalueor
Exponential Growth
yooo .im#oftimeperiod
-
×
)tÉif
tim
'
>'
every
& Decay when a quantity grows periodically by a factor / final quant
__
initial /growth period
'
shrinks
✓
if it > ,
use
k&t must have the t this wil
Linear Growth growth __ linew positive slope '
y=mx+b / linearis consistent a
same unit
Égive ev
rate of change from initial period
y=-mx+b /
✗
&
Decay decay rrrnegative -
Associations both decays have a negative association between two things .
as one thing ↑ ,
the other t
'
-
growths ~ positive mur mur
a strong association -4 -
occurs when data points are close to forming a line .
4. Rates
'◦◦ ¢
Conversion Factors multipliers to help go from one set of units to another e. g. $1
•
setup the right sequence inappropriate numerators & denominators
5. Ratio & Proportion
Ratios there arefor every 2x
2x :y= there is ly this can be expressed as
2"
,
y
.
•
similar to rates this is , basically a conversion factor
