Please answer quick it’s due tonight

The perimeter of a rectangle is 42 inches. if the width of the rectangle is 6 inches, what is the length

Which of the following constants can be added to x2 - 3x to form a perfect square trinomial?

What is the sum of the geometric series in which a1 = 7, r = 3, and an = 1,701? hint: cap s sub n equals start fraction a sub one left parenthesis one minus r to the power of n end power right parenthesis over one minus r end fraction comma r ≠ 1, where a1 is the first term and r is the common ratio