Cuel es el consiente de 14 y Y

When i add money am i supposed to make it like this 7+12 or 7.00+12.00 because i got 19 dollars for my answer

Suppose y varies directly with x. write a direct variation equation that relates x and y. then find the value of y when x=12 y=7 when x=3

Atransformation t : (x,y) (x-5,y +3) the image of a(2,-1) is