Rina's employer purchased a health insurance plan that costs $550 per month. Trina pays $85 toward the plan each month. What is the annual value of the employer's contribution?

It costs $550 per month but Trina pays $85. That means that the company pays $550-$85=$465 per month.

Since it is asking what the annual value is, meaning how much it pays per year, multiply $465 by 12 to get $5580 per year.