Solving Equations
Solve:
-2x + 7 = -17
x = 12
Name the property used:
2x + 4y - 3x = 2x - 3x + 4y
Commutative
What is the slope of a horizontal line?
Zero
What is slope intercept form?
y=mx+b
Find f(2):
f(x) = 6x + 1
13
Solve:
3x - 1 + 4x = 27
x = 4
Name the property used:
2(x+3) = 2x + 6
Distributive
What is the slope of a vertical line?
Undefined
Write the equation in slope intercept form: slope=0, y intercept =-5
y=-5
Find f(-3):
f(x) = 6x - 2
-20
Solve:
-2(x -5) = -2
x = 6
Name the property used:
7 + 9 + 14 = 9 + 7 + 14
Commutative
Find the slope of (4,-2) and(-1,2)
What is -4/5
Write the equation in slope intercept form: slope=4 and (0,-3) is on the line
y=4x-3
Find f(0):
f(x) = 2x - 5x + 19
19
Solve:
4x - 9 = 7x + 18
x = -9
Name the property used:
6 + (4 + 2) = (6 + 4) + 2
Associative
Find the average rate of change of (20,3000) and (60,2000)
What is -25
State the point at which the line crosses the y-axis(y-intercept):
y= 4x-3
(0,-3)
Find f(4):
f(x) = x2 - 4x -4
-4
Solve:
-2(2x - 3) + 11 = 6x - 3
x = 2
Name the property used:
6 + (2 + 4) = (2 + 6) + 4
Commutative AND Associative
Find the slope of the equation: 6x + 5y=30
What is -6/5
Write the equation in slope intercept form: 3x+2y=8
y=-3/2x+4
Find f(-3):
f(x) = 2x2 + 2