Simplify the expression by combining like terms: 3x^2 + 12x+11+14x^2+8x+5

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0if x and y vary inversely and y=6 as x=7, what is the constant of variation?

Afarmer has a large field that is x feet in length. he wants to fence in a rectangular section in the middle of the field , leaving a length of 100 feet of open field behind each end of the fenced rectangle.he also wants the width of the fenced-in space to be 100 feet less than its length. find the expressions to represent the length and width of the fenced section of the field