16. A volunteer made m muffins for a bake sale. After selling 28 muffins, 21 muffins
remained. The equation m - 28 = 21
represents the situation. What is the first
step in writing an equivalent equation to
solve m - 28 = 21?

Anyone know? is appreciated! will mark brainliest if correct!

Find dy/dx using implicit differentiation ln(20+e^xy)=y

Aproduction manager test 10 toothbrushes and finds that their mean lifetime is 450 hours. she then design sales package of this type of toothbrush. it states that the customers can expect the toothbrush to last approximately 460 hours. this is an example of what phase of inferential statistics