what is the closest estimate to 2 times 19 times 51,15020012590

Lisa has three classes that each last 50 minutes. what is the total number of minutes of the three classes

Given that ot =5, xt=12, and ox= 13 is xy tangent to circle o at t? explain.

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?