Ctor the polynomial completely using the X method.

x2 + 16x + 48
An x-method chart shows the product a c at the top of x and b at the bottom of x. Above the chart is the expression x squared + 16 x + 48.
Which equivalent four-term polynomial can be created using the X method?

x2 + 8x + 8x + 48
x2 – 12x – 4x + 48
x2 + 12x + 4x + 48
x2 – 8x – 8x + 48

#12 find the value of x. #13 find the value of the variable.

What is a rational number between 9.5 and 9.7

Set $r$ is a set of rectangles such that (1) only the grid points shown here are used as vertices, (2) all sides are vertical or horizontal and (3) no two rectangles in the set are congruent. if $r$ contains the maximum possible number of rectangles given these conditions, what fraction of the rectangles in set $r$ are squares? express your answer as a common fraction.