Isabella purchased 3 books from the book store. she now owns 11 books that she wants to read before the end of the year. if x represents the number of books she started with, which equation could be used to determine the value of x?

In a certain pentagon, the interior angles are a,b,c,d,e where a,b,c,d,e are integers strictly less than 180. ("strictly less than 180" means they are "less than and not equal to" 180.) if the median of the interior angles is 61 and there is only one mode, then what are the degree measures of all five angles?

Find the solution(s) to x^2-14+49=0

The difference of two numbers is 40. find the numbers if 0.3 parts of one number is equal to 37.5% of the other one.