31.693 rounded to the nearest whole number

Which expressions are equivalent to k/2 choose 2 answers: a k-2 b 2/k c 1/2k d k/2 e k+k

Karen will divide her garden into equal parts. she will plant corn in 8/12 of the garden. what is the lowest number of parts she can divide her garden into?

The cost of using a service is $0.25 per min. what equation correctly represents the total cost c, in dollars, for d days of use?