Which expression is equivalent to (r Superscript negative 7 Baseline) Superscript 6? r Superscript 42 StartFraction 1 Over r Superscript 42 Baseline EndFraction Negative 7 r Superscript 6 StartFraction 1 Over r EndFraction

Plot the intercepts to graph the equation

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.

Math question.. plz me .. best answer all