Factory a has printed 650 books, and prints 50 new books every week. factory b has printed 200 books and prints 100 books every week. how many weeks will it be until factor b has printed as many as book as factory a?

Write the expression 7x^3-28xy^2 as the product of 3 factors

Out of $20$ creepy-crawly creatures in a room, $80\%$ are flies and $20\%$ are spiders. if $s\%$ of the total legs belong to spiders, what is $s$?

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?