Lesson 2-5 & 2-6 review

​Lesson 2-5 & 2-6 review

By Erin Moots

• Cross multiply and solve

• Watch for Distributive Property!!

• Word problems - look for the sentence that gives 1 fraction.

​Solve Proportions

• This is when you're checking to see if two fractions are equal

• Cross multiply and look for equals

​Equivalent Proportions

Lesson 2-6: Proportionality

Multiple Choice

What is the correct next step when using the cross product method on this problem?

$$\frac{1}{2}=\ \frac{5}{10}$$  

• 1(10) = 2(5)

• 1(5) = 2(10)

• 1(2) = 5(10)

Multiple Choice

Is the following equation a Proportion or NOT? (Proportions have two equivalent ratios)

$$\frac{4}{7}=\frac{2}{4}$$  

• Proportion

• Not a proportion

Multiple Choice

Use cross products to determine if these ratios are proportional:
2/3 = 10/15

• no

• yes

Multiple Choice

Do the ratios form a proportion?

• Yes, they form a proportion.

• No, they do not form a proportion.

Multiple Choice

Do the ratios form a proportion?

• Yes, they form a proportion.

• No, they do not form a proportion.

Multiple Choice

Solve for k

• 7/12
• 12/7
• 7
• 2

Multiple Choice

Solve for x

• 13
• 14
• 15
• 16

Multiple Choice

Solve the proportion

• x = 3
• x = -3
• x = 1
• x = -1

Multiple Choice

Solve for b 

• b = 8
• b = 17/12
• b = 4/3
• b = 1/8

Multiple Choice

Solve for k

• 165
• 17
• 1/17
• 1/165

• Solve TWO equations for each absolute value. ONE POS, ONE NEG.

• Graph on a number line

Solve Equations

• Plug the numbers in for the variables

• Solve

• Take off bars only when you're down to 1 digit

Solve Expressions

Lesson 2-5: Absolute Value

Multiple Choice

Evaluate the expression if x = -5.

|2 - x|

• 3

• -3

• 7

• 7

Multiple Choice

Evaluate the expression if x = -5.

|-2x - 12|

• 2

• -2

• 22

• -22

Multiple Choice

Evaluate the expression if x = 3 and y = -4.

|3x - 5| + y

• 0

• 3

• -3

• 8

Multiple Choice

Evaluate the expression if x = 2, y = -4, and z = 10

6 + |2y + z| - |5x|

• -2

• 2

• 14

• 18

Multiple Choice

Solve for x
l 5x l = 40

• x = 8 and x =-8
• x = 35 and x = -35
• Only x = 8
• No Solution

Fill in the Blanks

|8 - 4x| = 16

Fill in the Blanks

∣2x + 9∣ = 15

Drag and Drop

Solve for x

l 2x−1 l = 9

x = ​

Placeholder

and x = ​

Placeholder

Drag these tiles and drop them in the correct blank above

No Solution

5

-4

4

-5