What is 4.5x + 2.5(x - 4)

f(x) is   are being squared

g(x) is   increasing by 2

h(x) is adding .25 each time

k(x) is taking the square root

f(x) and k(x) are exponential functions

i think this is a open ended question but i agree with other guy who said you should ask it at english section

all of them are elements inside set of real numbers since none of them appears to have complex number form.

hope this .

r3t40