Plz explain how to solve
-12 - (-21) i already know the answer but i need to show work thx

27 is what percent of 108? 27 is % of 108

Janet drove 300 miles in 4.5 hours. write an equation to find the rate at which she was traveling

Due to bad planning, two of the local schools have their annual plays on the same weekend. while 457 people attend one, and 372 attend the other, only 104 people were able to attend both. how many people went to at least one play?