Solving Proportions with Cross Products

What is the main technique introduced in this section for solving proportions?

• Subtraction

• Division

• Addition

• Cross products

Tags

CCSS.7.EE.B.3

Why is it important to keep the volume on while watching the video?

• To hear the teacher's additional explanations

• To hear background music

• To see the subtitles

• To avoid missing visual cues

Tags

CCSS.RI.6.7

CCSS.RI.8.7

CCSS.RI.9-10.7

CCSS.RL.8.7

CCSS.RL.9-10.7

In the basic example, what operation is used to cancel out the denominator?

• Division

• Subtraction

• Addition

• Multiplication

Tags

CCSS.4.NF.B.3C

CCSS.4.NF.B.3D

What is the final answer for x in the basic example?

• 9

• 8

• 6

• 7

Tags

CCSS.6.EE.B.7

What happens when you multiply both sides of a proportion by the same number?

• The denominators are canceled out

• The proportion becomes invalid

• The proportion remains unchanged

• The numerators are canceled out

Tags

CCSS.7.RP.A.2B

In the example with x in the denominator, what is the first step to solve for x?

• Add x to both sides

• Subtract x from both sides

• Multiply both sides by x

• Divide both sides by x

Tags

CCSS.6.EE.B.7

What is the result of 15 * 8 in the cross product example?

• 110

• 130

• 100

• 120

Tags

CCSS.7.EE.B.3

In the complex example, what property is used to eliminate parentheses?

• Identity property

• Associative property

• Distributive property

• Commutative property

Tags

CCSS.7.NS.A.1D

What is the final value of x in the complex example?

• -3

• 3

• -4

• 4

Tags

CCSS.8.EE.C.7B

When is cross multiplying used?

• When dividing fractions

• When solving proportions

• When subtracting fractions

• When adding fractions

Tags

CCSS.7.EE.B.3