Answer: Anything greater than -2.5
Explanation:
To solve the equation 2.5 + _ = a positive, we need to find the value that, when added to 2.5, results in a positive number. Let's denote the unknown value as x. Therefore, the equation can be written as:
2.5 + x > 0
To isolate x, we can subtract 2.5 from both sides of the inequality:
x > -2.5
This means that any value of x greater than -2.5 will satisfy the equation and make it positive.