Answer:

Step-by-step explanation:
the answer is one because 1×anything equals what your multiplied one by
The answer of this question is going to be 90
Answer:
100 is grace's initial amount. w is how much of the substance is being decrased each week. in ryan's equation, 1 is 100% of the substance, so the initial amount, and 0.4 is the amount that is being decreased.
Step-by-step explanation: