How many different ways are there to arrange the letters a, b, a, and b? 4

Which of these is and example of a literal equation? a) 6+30=6^2 b)3x-4y c)12=9+3x d)ax-by=k

Rose bought a new hat when she was on vacation. the following formula describes the percent sales tax rose paid b=t-c/c

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.