Explain how to find 40x80 using mental math

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 the value of x. give reasons to justify your solutions! h ∈ ig

Afamily went out to dinner and their bill was $113.if they want to leave a 19% tip, how much should they leave.