How do you simplify -7 + 12

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.

Find two consexutive odd integers such that the sum of their square is 650

Which graph represents the given linear function 4x+2y=3