Hey there!
Guide:
• Sum means add/addition
• Difference means subtract/subtraction
• Product means multiply/multiplication
• Quotient means divide/Division
So, let’s answer your given question.
Key terms in your word problem
“The SUM of -9 and a NUMBER”
Sum is to add and Number is to unknown so we can label it as “x”
Your equation/answer should be:
-9 + x
Because you’re adding -9 to your unknown number (x)
Good luck on your assignment & enjoy your day!
~Amphitrite1040:)