This is the answer 6x^2+15x+9
Seven million, nine hundred thousand, 10 thousand, five thousand, eight hundred seventy eight,
or
seven million, nine hundred fifteen thousand, eight hundred seventy eight
1) Take the perimeter and divide it by 4.
2) Take the answer from step 1 and square it (multiply by itself)
28 tries. The ratio is 5:7, so once you multiply 5 by 4 to get 20, you do the same to 7 to get 28.