Since d=8, your going to multiply 8x2 to get 16 and then you’ll add 16 to 3. So 16+3=19. How did I get this answer? Well D=8 and whenever a variable and a constant are placed together and you don’t see the multiplication sign, that means they are being multiplied so that’s why we’re doing 8x2 to get 16. The answer to this question is 19