5+9÷3x2-1+5x2 darla simplifies the expression and says it has a value of 18. eddie simplifies it and says that it has a value of 20. use grouping symbols to rewrite the expression to have a value of 18.

Since opening night, attendance at play a has increased steadily, while attendance at play b first rose and then fell. equations modeling the daily attendance y at each play are shown below, where x is the number of days since opening night. on what day(s) was the attendance the same at both plays? what was the attendance? play a: y = 8x + 191 play b: y = -x^2 + 26x + 126

Offering 30 if a plus b plus c equals 68 and ab plus bc plus ca equals 1121, where a, b, and c are all prime numbers, find the value of abc. the answer is 1978 but i need an explanation on how to get that.

Find the greatest common factor of the followig monomials 21u^5v,3u^4v^6, and 3u^2v^5