So we know that the perimeter is 1260 feet and that the length is 100 more than the width, but we don't know that the width is.
So we're going to start with finding the width.

from there we need to combine like terms

now we have

From there, we will need to remove 100 from both sides, leaving us with

now we'll need to divide both sides by 2


We now know that the width is 580, or more simply put, x=580.
Finding the length will be the easy part, as we know that it is just 100 more than the width

If you want an easier way of finding the length, just subtract the width from the perimeter.

Leaving the final answer to be
Width = 580
Length = 680
F(x) = -4x^7 +x^3 -x^2 +5
a) It is a degree 7 polynomial, so will have 7 zeros (some may be repeated).
b) has 3 sign changes, so 1 or 3 positive real zeros. If odd powers have their signs reversed, the signs are changed to +--+, so there are 2 sign changes. There will be 0 or 2 negative real zeros.
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There is actually 1 positive real zero and 0 negative real zeros. This means there are 3 conjugate pairs of complex zeros.
Answer is Tuesday because if you turn all the fractions into a percentage then Tuesday has the highest percentage.
I think 55 because you would multiply 11×5