Function g is define by g(x) = 3(x+8). what is the value of g(12)

When given a function and asked to find the value of a number, in this case g(12), simply plug 12 into all x places in the equation:

g(12)=3(12+8)

g(12)=36+24

g(12)=60

4 and 5)16.97 or 12√2

6)15.59 or 9√3

7)y = 15.59 or 9√3     x =27

8)17.80