There are 4 different parts aligned for each housing. align the 4 parts in the correct order. find the probability that all 4 are aligned correctly.

According to statistics a person will devote 32 years to sleeping and watching tv. the number of years sleeping will exceed the number of years watching tv by 18. over a lifetime, how many years will the person spend on each of these activities

Name each raycalculation tip: in ray "ab", a is the endpoint of the ray.

Louise measured the perimeter of her rectangular scrapbook to be 154 cm. if the scrapbook is 45 cm wide, how long is the scrapbook?