Tristan is having a birthday party. He doesn’t want anyone less than 10 years old to come to his party. If y equals age in years, which number sentence expresses his age requirements?




A. y < 10

B. 10 = y

C. y 10

D. 9 > y

It would help if you proofread your questions before you posted them.

y > 10

The number sentence that expresses Tristan's age requirements is "C. y ≥ 10".

To understand why this is the correct answer, let's break down the options and evaluate them:

A. y < 10: This option states that y (age) is less than 10, which means anyone younger than 10 would be allowed at Tristan's party. However, the question clearly mentions that Tristan doesn't want anyone less than 10 years old to attend.

B. 10 = y: This option states that y (age) is equal to 10. Although it's correct that Tristan wants kids who are at least 10 years old, this statement doesn't cover ages greater than 10, which means it excludes older children who are also allowed to attend.

C. y ≥ 10: This option states that y (age) is greater than or equal to 10. Since Tristan doesn't want anyone less than 10 years old, this option expresses his age requirements accurately. It allows kids who are exactly 10 years old as well as those who are older.

D. 9 > y: This option states that 9 is greater than y (age), which means it excludes all ages including 10 and older. This contradicts Tristan's requirement of allowing kids who are 10 years old and older.

Therefore, the correct answer is C. y ≥ 10.