Final answer:
Translate the sentence '9 more than Diane's savings is 40' into an equation by representing Diane's savings with the variable 'd' and writing the equation d + 9 = 40.
Step-by-step explanation:
To translate the sentence into an equation, we need to represent Diane's savings with a variable. Let's use d to represent her savings. The sentence says '9 more than Diane's savings is 40', which can be written as:
d + 9 = 40
This equation represents the fact that adding 9 to Diane's savings results in 40.