If A = -3n + 2 and B = 5n - 7, what is the value of A - B, in simplest form?

PLEASE HELP ;^;

Apark is in the shape of a rectangle. the park authorities are planning to build a 2-meter-wide jogging path in the park (shown as the shaded region in the image). what is the area of the jogging path? plz

F(x) = 1/x g(x)=x-4 can you evaluate (g*f)(0) ? why or why not?

There are a total of 75 students in the robotics club and science club. the science club has 9 more students than the robotics club. how many students are in the science club?