Answer:
Explanation:
The constant term in the expression 2.50a + 290 is 290, which represents Mike's base pay or weekly salary.
In other words, regardless of how many cell phone accessories Mike sells in a week, he will earn $290 as his base pay. The term 2.50a represents the additional amount he earns based on the number of accessories he sells, as he earns $2.50 for each accessory sold.