A rectangle has a length of 8 inches and a width of 9 inches whose sides are changing. The length is decreasing by 3 in/sec and the width is shrinking at 6 in/sec. What is
the rate of change of the perimeter?

goog may have it for you

the answer is 13

step-by-step explanation:

5*5=25

12*12=144

25+144=169

169^2=13

d

step-by-step explanation:

the two points from this line are   (0,4)   & (2,-2)

we can call

now, lets find the slope (m):

now finding b (the y intercept). this is the point at the y-axis where the line cuts the axis. looking at the graph, it is y = 4. so the point is 4. hence b = 4

the slope-intercept form is given by  

putting the points, we have:

d is the correct answer.