let x be the age of her son
y = 25 + x
y - 25 = x
(y + 12) + (x + 12) = n
y + x + 24 = n
y + y - 25 + 24 = n
2y - 1 = n
sub
2(38)-1 = n
n = 78
Which form of calculation of resolution is preferred when scanning a image
Answer: I think the answer to both is DPI.
Explanation: Im guessing based of previous answers on the test.