Solving Key Relationship Problems

The video tutorial explains how to solve a problem involving Hazel and Leo's keychains. Leo has four more keys than Hazel, and together they have 18 keys. The tutorial demonstrates setting up two equations to represent the problem and solving them using both substitution and elimination methods. The solution reveals that Hazel has 7 keys.

What is the total number of keys Hazel and Leo have together?

• 14

• 18

• 22

• 26

How many more keys does Leo have compared to Hazel?

• 4

• 3

• 5

• 2

What are the two unknowns in the problem?

• Total keys and difference in keys

• Number of keys Leo has and total keys

• Number of keys Hazel has and total keys

• Number of keys Hazel has and number of keys Leo has

What does the variable 'L' represent in the equations?

• Difference in keys

• Number of keys Hazel has

• Number of keys Leo has

• Total number of keys

What does the equation L = H + 4 represent?

• Leo has 4 more keys than Hazel

• Leo has 4 keys

• Hazel has 4 more keys than Leo

• Hazel has 4 keys

What is the equation representing the total number of keys?

• L - H = 18

• L - H = 4

• L + H = 18

• L + H = 22

Which method is used first to solve the equations?

• Substitution

• Trial and Error

• Elimination

• Graphing

What is the value of H after using substitution?

• 8

• 7

• 6

• 5

What is the value of L after using substitution?

• 10

• 12

• 11

• 9

Which method is used second to solve the equations?

• Trial and Error

• Elimination

• Substitution

• Graphing