Download 1.4 Equations vs. Expressions

You pick any five single digit numbers, and then
pick a two digit number.
I GUARANTEE THAT WE CAN USE OUR
ORDER OF OPERATOINS AND HAVE THE
FIVE DIGITS EQUAL THE TWO DIGIT
NUMBER!!!!
It is a statement formed by placing
an equal sign between two
expressions
4x + 1 = 9
It is a value or number that makes
the equation TRUE
4x + 1 = 9
Is x = 3 a solution?? NO
Is x = 2 a solution?? YES
1.)
2.)
3.)
4.)
5.)
1 + 3 < 5 YES
1 + 3 ≤ 5 YES
7 ≥ 9 NO
¾ < ⅚ YES
⅔ > ⅞ NO
In the expression 3x + 2, 3x
and 2 are called terms of the
expression.
 In the expression 4x , 4 and
x are called factors of the
expression.
 What’s the difference
between a term and a factor?

Example: The sum of 3 and a number
evaluate when n = 4
3+ n
3+ (4)
=7
5x
5(-1)
= -5
18- z
18- 23
= -5
16 16
= -4
m -4
8(2n)
8(2(3))
= 8(6)
= 48
3k + 4
3(-2)+ 4
= -6 + 4
= -2
Expressions
8y, 16a/b, 4r + s,
Equations
3x + 4 = 6
3r = 9
7
Write the
expression
Substitute
the values
Simplify
the
expression
5x + 4y
5(3) + 4(2)
15 + 8
23
x + (2x -1)
3 + (2(3) - 1)
3+
8
5
d = rt
d =(75)(1.5)
d = 112.5
So the distance traveled is
112.5 miles
d = rt
d =(63)(2.5)
d = 157.5
So the distance traveled is
157.5 miles
1.)
x
-6
3
2.)
3x
3.)
3k - k
3
when x = 24
when x = 4
when k = 12