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Addition
Subtraction
Multiplication
Division
Ind./Dep. Variable
100
x + 8 = 24
What is 16
100
x - 12 = 1
What is 13
100
3x = 42
What is 14
100
x / 8 = 7
What is 56
100

The equation A=25w represents the area A (in square feet) of a rectangular dance floor with a width of w feet. Identify the variables.

w - width (ind.)

A - Area (dep.)

200
28 + x = 43
What is 15
200
x - 49 = 23
What is 72
200
12x = 48
What is 4
200
x / 25 = 11
What is 275
200

Describe the difference between independent and dependent variables. 

An independent variable can change freely. A dependent variable depends on the independent variable. 

300
32 = 5 + x
What is 27
300
31 = x - 24
What is 55
300
112 = 14x
What is 8
300
x = 87 / 3
What is 29
300

Tell whether the ordered pair is a solution to the equation. y=2x+1; (2,5)

yes

400
81 = x + 49
What is 32
400
x - 43 = 55
What is 98
400
256 = 16x
What is 16
400
23 = x / 12
What is 276
400

A bus averages 60 mph between two cities. Write an equation that represents the relationship between time (t) and distance (d). Then, tell how long it takes the bus to travel 240 miles.

d=60t

4 hours