Mr. takaya can eat three slices of pizza in five minutes. if he continues to eat at the same rate, how long will it
take him to eat the whole pizza, which has twelve slices? how many slices could he eat in half of an hour?

It would take him 20 minutes

Step-by-step explanation:

Every 5 minutes he eat 3 slices. That means in 10 minutes he would eat 6 and in 15 minutes he would eat 9. You add 3 minutes for every 5 minutes

i am unable to solve this problem

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'.