Who can answer this??

Solve the equation using the given values: x= -2.5; y= -7.51. 2xy + 2x²

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.

What percent of 18 is 24? and plz explain thx.