Simplify 1/2 - 3 (1/2 + 1)*
Enter your answer in the box as a fraction in simplest form.
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In two or more complete sentences describe how to determine the appropriate model for the set of data, (1,1), (3,2), (6,3), (11,4).

How can you tell when x and y are not directly proportional?

Lizette is training for a marathon. at 7: 00 she left her house and ran until 8: 30, then she walked until 11: 30. she covered a total distance of 18 miles. her running speed was six miles per hour faster than her walking speed. find her running and walking speeds in miles per hour.