feet of a tank is 25x+12 and width is 7x+18. Write an expression to determine the amount of rubber in feet to go around the top edge of tank .

Question

A tank will have a length in feet represented by 25x+12 and a width in feet represented by 7x+18. Write and simplify and expression hat could be used to determine the amount of rubber, in feet, needed to place around the top edge of the rectangular tank .

Answer 1

Oh, whew, we're talking something like a water tank. I at first thought it was like a military tank.

So we're looking at the area of a rectangle, length times width. That means we have the following:

A = (25x + 12)(7x + 18)

And now we need to FOIL:

25x * 7x = 175x²

25x * 18 = 450x

12 * 7x = 84x

12 * 18 = 216

That leaves us with the following:

A = 175x² + 450x + 84x + 216

You should be able to simplify (combine like terms) from here.