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a negation of a statement has the truth value

What expression is equivalent to log3(x+4)

Solving algebraic equations 2m+3=11

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.