Algebra I : Unit 2 Review

What should we do first to solve for x?

y=mx+b

• Add b

• Subtract b

• Multiply by m

• Divide by m

a = b + c   , for  c

• c = a - b

• c = a + b

• c = ab

• c = a / b

Solve for y:
y + 2 = 3x

• y = 2x + 3

• y= 3x +2

• y= 3x -2

• y= 6x

 Solve the equation for x.
12x - 15 = 6x + 9 

• x = 4

• x = -4

• x = 2

• x = -2

x + 4 = x

• x = 1

• x = -3

• No Solution

• Infinitely Many Solutions

Find the Absolute Value of -18

• 18

• -18

• 36

• -36

What's another way to define absolute value?

• The value of a number

• The opposite of a number

• The distance of a number from zero

• The multiplicative inverse of a number

∣ 2x + 9 ∣ = 15

• x = 3 

• x = 3
  x = -6

• x = 3
  x = -12

• x = 6
  x = -12

0 < x + 7 < 9

• -7<x   and   x<2

• -7<x   or   x<2

• -7>x   and   x>2

• -7>x  or   x>2

What inequality is graphed?

• x > 2 and x < 4

• 2 ≤ x ≤ 4

• x > 2 or x < 4

• x ≥ 2 or x ≤ 4