Which expression has the same value as 2n + n

What adds to be the bottom number but also multiplies to be the top number with 8 on the bottom and 15 on top

The distance between two points is 6.5cm and scale of map is 1: 1000 what's the distance between the two points

Suppose that the function f is defined. , for all real numbers, as follows. _ \ 1/4x² -4 if x≠ -2 f(x)=< /_-1 if x=-2 find f(-5), f(-2), and f(4)