Write as a product:
c²+d - d²+c

dilation scale factor 2: starting with δabc, draw the dilation image of the triangle with a center at the origin and a scale factor of two. notice that every coordinate of the original triangle has been multiplied by the scale factor (x2). dilation with scale factor 2, multiply by 2.

is the anwser b. (-13)?

time is equal to distance over rate so

t = d/r

need a little bit more information for the second question.