13, because 78 postcards divided by 6 cards per board = 13 poster boards
The elephant weighs 9,430 pounds more than the donkey.
Answer:
A^(2) + B^(2) = C^(2)?????????????
Step-by-step explanation:
that's an isosceles triangle, not a right-angle triangle
The equivalent equation is d=17+12.5
it simplifies to d=29.5
