Final answer:
To find the best value of t which satisfies the equation -7t≤9, the value of t should be greater than or equal to -9/7.
Step-by-step explanation:
To find the best value of t which satisfies the equation -7t≤9, we need to rearrange the equation to isolate t. Dividing both sides of the inequality by -7 gives us t≥9/-7, which simplifies to t≥-9/7. Therefore, the best value of t that satisfies the equation is t≥-9/7.