Mackenzi got 30 questions correct out of a total of 35. To the nearest percent, what was the percentage she got correct?

If f(x)=2x-6 and g(x)=3x+9, find (f-g)(x)

Ineed in figuring out this problem.

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.