Evaluating Expressions
8x-2 when x=3
22
The product of a number and seventeen
17n
Identify the variable terms
5h -14 + 3h
5h and 3h
Simplify
-7(2n-1)
-14n+7
What property
(9k + 7) +5 = 9k + (7+5)
Associative Property of Addition
-5x+3y when x=3 and y=2
-9
the difference of twice a number and 1
2n-1
Identify the coefficients
18r-5+16-2r
18 and -2
Simplify
9(a+2)-3
9a+16
What property says a number multiplied by 1 is itself?
Identity Property of Multiplication
x2 + 3x when x=2
16
three less than the quotient of a number and negative 2
(n/-2) - 3
Describe what a constant term is
The term that is always the same, it has no variable.
Simplify
8k-2(9-k)-1
10k-19
Identify the Property
16(12) - 16(5) = 16 (12-5)
Distributive Property
2(6-y)+3x when y=10 and x=3
1
one fourth of a number
1/4n
Identify the variable terms
18r-5+18s+12q-7+9x
18r, 18s, 12q, 9x
Factor
32a+20b
4(8a+5b)
What property says that anything plus zero is itself
Identity Property of Addition
1/2 ( c + d) when c=2 and d= 8
5
Five sixths of the workers at a company got a raise. If w represents the number of workers, write an expression to represent how many workers got a raise.
5/6w
What is a variable? Give an example
A variable is a symbol in place of an unknown value.
ex. x, r, y
Factor
-12x-21
-3(4x+7)
What Property
-2 + 7(0) = -2 + 0
Multiplication Property of Zero