Plz me im terrrible at math p if you know the rest of answers plz feel free to answer
)^-4
a.)12

c.)1/81
/81
.4)0

.4
c.)0
d.)1
)^-1
/5

c.)5
d.)1/5
4.-1/a^-2

/a

d.)a^2

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.