Module 2 Review Part 2

Solve 3x+1=4x – 8

Mathematical Equivalence

ON

Solve 5(2y+1)=4y+10

• 5/6

• 3/2

• 15/14

• 5/2

Classify each equation as having one solution, having no solution, or being an identity.

• identity

• 2x+6=2(x+6)

• one solution

• 2x – 6=6 – 2x

• no solution

• 2x+6=4+2(x+1)
  

PLANTS  Bamboo is a very fast growing plant. The table shows the current height and average growth rate of two bamboo plants from different species.

After how many days will the two bamboo plants be the same height?

• 2 days

• 3 days

• 8 days

• The bamboo plants will never be the same height.

Select all values of x that are solutions of
|3x−6|=12

• -18

• -6

• -2

• 2

• 6

Which number line shows the solution set of |2−x|=3?

• A

• B

• C

• D

TEMPERATURE  A thermometer is accurate to ±2°F. Which absolute value equation can be used to find the greatest and least possible temperatures if the thermometer reading is 17°F?

• 
  |t − 17|=2

• 
  |t+17|=2

• |t − 2|=17

• |t + 2|=17

• 1/18

• 1/8

• 8

• 18

• -4

• 4

• 8

• 20

A biologist studying seagulls estimates that 5% of the seagulls in a flock have been banded. If 22 of the seagulls have been banded, approximately how many seagulls are in the flock?

• 110

• 440

• 1100

• 4400