Correct Answer: d ≤ 23.25
16.75 + d ≤ 40 (d stands for dollars. we don't know what number d stands for yet, so we need to figure it out. We know that he can spend no more than $40, so that is why the "≤" sign is there. He can either spend equal to $40 or less than $40 is what the "≤" sign is saying.)
So if the total money Heath can spend is $40 and he's already spent $16.75, then we just find out how much money is left that he can spend.
You have to subtract 16.75 from both sides of the less than or equal to sign (≤). 16.75 minus 16.75 equals zero. 40 minus 16.75 equals 23.25.
So now we have: d ≤ 23.25 . That is the answer.
Sorry that took FOREVER. I had to make sure it was correct.
Answer: d ≤ 23.25
