X(x+3)-7(x+3)
x2+3x-7x-21
x^2-4x-21
42 is 21% of 200. This is because 200*0.21 = 42.
I think it is D ... I am very sorry if I am wrong :)
The first thing to do in this case is to draw the ordered pairs in the Cartesian plane and join the points.
We have then that the resulting figure is a rectangle.
We must find the perimeter of the rectangle that is given by:
P = 2L + 2W
Where,
L: long
W: width
Restoring the values:
P = 2 * (5) + 2 * (3)
P = 16
Answer: her route cover 16 miles.