Two pulses traveling on the same string are described by y1 = 5 (a x − b t) 2 + 2 and y2 = −5 (a x + b t − 6)2 + 2 where a = 9 m−1 and b = 10 s−1 . at what time do the two cancel? answer in units of s.

For the following sequence determine the common difference (if it is an arithmetic sequence) or the common ratio (if it is a geometric sequence).

What kinds of numbers make up the set of numbers called the real numbers? give examples when you explain a number type. there are a limited set of types of numbers, but an unlimited number of examples of these numbers.

Nick has box brads. he uses 4 brads for the first project. nick let’s b represent the original number of brads and finds that for the second project, the number of brads he uses is 8 more than half the difference of b and 4. write an expression to represent the number of brads he uses for the second project.