Translating Expressions
Three more than twice some number
2n+3
This is used to represent an unknown value.
variable
b^2-a^3 when b = 5 and a = -2
33
-2(-3n-4)
6n+8
2n-8
2(n-4)
n/5-6
Six less than the quotient of a number and five
Numbers written on their own are known as these.
Constants
(c+d)/(c-d) when c=-4 and d=-2
3
5(4n-3)
20n-15
12n+33
3(4n+11)
Squaring the sum of a number and seven yields 49
(n+7)^2=49
A number attached to a variable through multiplication is known as this...
Coefficient
32+e^2*(f-4) when e=-3 and f=5
1
-(n-6)
-n+6
35-21n
7(5-3n)
3(4n-6)=(n-12)/7
Three times the difference of four times a number and six equals the difference of that same number decreased by twelve all divided by seven
These together make up expressions, always separated by addition or subtraction signs...
Terms
(gh)/(2+h)-g when g=-12 and h=4
20
2(n-4)-6(9+3n)
-16n-58
48xy-24y
24y(2x-1)
One fourth of a number less the product of four and that number is eight more than twice the same number
1/4n-4n=2n+8
What is the difference between an expression and an equation?
An equation has an equal sign and must always be true. An expression does not have an equal sign.
[16-i+(j/4)]-((4i)/j) when i=8 and j=-16
6
-8(8n+8)+8(-8n+8)
0
10ab-12bc+16abc
2b(5a-6c+8ac)