Unfortunately, limitations of the browser used by Answers.com means that we cannot see most symbols. It is therefore impossible to give a proper answer to your question. Please resubmit your question spelling out the symbols as "plus", "minus", "times", "equals", "squared", "cubed" etc.
Having said that, the equation in the question cannot represent a solid since it has only two variables: a solid needs three.
400 400 and a 428 400 and a 428 400 and a 428 400 and a 428 400 and a 428 400 and a 428 400 and a 428 400 and a 428 400 and a 428 400 and a 428 400 and a 428 400 and a 428 400 and a 428 400 and a 428 400 and a 428 400 and a 428 400 and a 428 400 and a 428 400 and a 428 400 and 428
428 is equal to 428. No other number is equal to 428.
y=24
6% of 428= 6% * 428= 0.06 * 428= 25.68
y = -5x2 - x + 9
The factors of 428 are 1, 2, 4, 107, 214, and 428.
The positive integer factors of 428 are: 1, 2, 4, 107, 214, 428
428+94 = 522
428 as a percentage would be 42800%.
428 is an even number.
428 + 217 = 645
It is an algebraic expression in the two variables, x and y.