While on vacation, sandra wants to buy 2 wallets. there are 7 different patterns she can choose from. in how many ways can sandra choose 2 different wallets?

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

Lisa has three classes that each last 50 minutes. what is the total number of minutes of the three classes

Use the net as an aid to compute the surface area of the triangular prism. a) 550 m2 b) 614 m2 c) 670 m2 d) 790 m2