Marco owed his father $175 and began paying him back $15 at the end of each week, beginning November 1. Joni owed her father $120 and began paying back $10 at the end of each week, beginning on the same day. What Marco owed his father in dollars at the end of n weeks can be represented by f(n) = 175 − 15n. What Joni owed her father in dollars at the end of n weeks can be represented by g(n) = 120 − 10n. Find the value of n for which f(n) = g(n). What does that value mean in this situation?

use formula for the circle a=3.14

step-by-step explanation:

c. (3,2,6) is the answer.

for the friend request.

when a figure, such as triangle (xyz) is reflected over the line y = x to create x'y'z' the x-coordinates and y-coordinates of the original image (pre-image) will be reversed for the image. (e.g., (x, y) > (y, x)) this means that the pre-image position of the x- and y-coordinates switch places which in turn provides a mirror like image of the original xyz.  

i notice that when i draw a line segment from x to x', that the points are parallel from each other -- they are exactly across from each other and do not intersect with any other points.  

yes, think i would see the same characteristic if you drew the line segment connecting y with the reflecting line and then y' with the reflecting line because of the essence of reflections. because it is a mirror image, each point was effected the same way which leads me to conclude that they same would apply to y and y'.