Which equation represents a direct variation? A. y = 2^x
B. y = x + 4
C. y = 1/2x
D. y = 3/x

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.

3/4 + p = 1/2? i’m not sure how to solve it

What is the benefit of converting measures in a ratio to the same unit