Question

write as an expression, three times cassies age increased by 9 9x + 3 9x - 3 3x - 9 3x + 9

Explanation:

Step1: Define variable for Cassie's age

Let \( x \) represent Cassie's age.

Step2: Translate "three times Cassie's age"

Three times Cassie's age is \( 3\times x = 3x \).

Step3: Translate "increased by 9"

Increased by 9 means we add 9 to the previous result, so the expression is \( 3x + 9 \).

Answer:

D. \( 3x + 9 \)