Vocabulary
In the equation y = x + 9 ; is the variable x the independent or dependent variable?
independent variable
d + 9 = 25
d = 16
If 6 + 2 = 8, does 6 + 2 +3 = 8 + 3
Why or why not?
Yes, 3 was added to both sides
8x = 64
x = 8
The value v, of the hat is less than $9.
v < 9
True or False
An inequality has an infinite number of solutions.
True
c - 8 = 25
c = 33
If 8 - 1 = 7, does 8 - 1 - 2 = 7 - 3
Why or why not?
No, unequal amounts are subtracted from each side of the equation
x + 21.9 = 27.1
x = 5.2
Draw on a line graph x > 5
In the equation y = x - 9, is the variable y the independent or dependent variable?
Dependent
2y = 30
y = 15
If 4 + 6 = 10, does 4 + 6 x 3 = 10 x 3
Why or why not?
Yes, both sides of the equation were multiplied by 3
2,448 / 48 = x
x = 51
Identify the independent and dependent variable:
The calories, c, in a snack and the amount of the snack, a
a = independent
c = dependent
Name the property of equality that this equation represents
(6 + 3) - 3 = 9 - 3
150 / h = 50
h = 30
If 5 + 4 = 9, does (5 + 4) /3 = 9 / 4
Why or why not?
No, both sides of the equation were not divided by the same number
3/4 x = 12
x = 16
Identify the independent and dependent variable
The number of apple slices remaining, r , and the number of apple slices eaten, e
r = dependent
e = independent
Name the property of equality this equation represents
( 6 + 3 ) x 3 = 9 x 3
Multiplication Property of Equality
f - 13.2 = 28.9
f = 42.1
If 6 + 4 = 10 , does 6 + 4 + 5 = 10 + 3 + 2
Why or why not?
Yes, both sides of the equation were added by 5 ( 3 + 2 = 5)
14x = 73.5
x = 5.25
Identify the dependent and independent variable
The amount of money you have spent, s, and how much money you have left, m.
s = independent variable
m = dependent variable