Which of the following is a polynomial with roots 4, −5, and 7?

If x=a is a zero of f(x) then (x-a) is a factor of f(x). Then, since x= 4,6,-7 are all zeros of f(x), we may 
write f(x) = (x-4)(x-6)(x+7) = (x-4)(x^2 + x - 42) = x^3 -3x^3 -46x +168. This is choice B. I have no 
difficulty in expanding and mentally collecting terms to write the coefficients of descending powers of x in 1 step as I proceed. This is a very useful technique. It forces a systematic, concentrated method on one which prevents sloppy mistakes.

1200 inches = 30 yards12 inches= 1 foot3 feet= 1 yard3feet= 36 inchesyou can set up a proportion then use inverse operations that looks sorry it looks so sloppy lol

The discount is 8.70 . you dont tell us the percent of tax added so there is no way to find out, unless i'm not seeing anything. without tax its 37.70