A man bought 5 reams of duplicating Paper each of which was supposed to contain 480 sheet. The actual number of Sheet in the package was 435, 420,405, 415 and 440 Required
a) calculate Correct to the nearest whole number the average error for the packet of paper
b) If the agreed Price for a full ream was N35 Find Correct to the nearest naira the amount by which the buyer was cheated.

i need more info. are you looked to see there mph? how much they deliver? how far they go?

step-by-step explanation:

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'.