Question | Answer |
simple interest formula | I=prt
I=interest in dollars
P=principal in dollars
R=annual interest rate written as a decimal
T=time in years |
addition property of equality | for every real nnumber a,b,and c,if a=b,then a+c=b+c |
inverse property of multiplication | for every nonzero number a,there is a multiplicative inverse such that ax1/a=1 |
percent equation | a=p%xb,where b does not=0 |
identity property of addition | for every real number a,a=0=a |
percent of change | p%=amount of increase or decrease/original amount
amount of increase= new amount- original amount
amount of decrease= original amount- new amount |
associative property of addition | for every real number a,b,and c,(a+b)+c=a+(b+c) |
order of operations | 1) perform an operation(s) inside grouping symbols.
2) simplify powers.
3) multiply and divide from left to right.
4) add and subtract from left to right. |
identity property of multiplication | for every real number a,ax1=a |
commutative property of multiplication | for every real number a and b,axb=bxa |
multiplication property of -1 | for every real number a,-1xa=-a |
commutative property of addition | for every real number a and b,a+b=b=a. |
inverse property of addition | for every real number a,there is an additive inverse -a such that a+(-a)=0 |
percent proportion | a/b=p/100, where b is not=0 |
subtraction property of equality | for every real number a,b,and c,if a=b, then a-c=b-c |
associative property of multiplication | for every real number a,b,and c,(axb)xc=ax(bxc) |
zero property of multiplication | for every real number a,ax0=0 |
relative error | measured or estimated value- actual value/actual value |
distributive property | for every real number a,b,and c:
a(+c)=ab+ac
(b+c)a=ba+ca
a(b-c)=ab-ac
(b-c)a=ba-ca |
division property of equality | for every real number a,b,and c,where c is not=0, if a=b, then a/c=b/c |
cross products of a proportion | if a/b=c/d,then ad=bc |
multiplication property of equality | for every real number a,b,and c,if a=b,then axc=bxc |