Noah and kate are shopping for new guitar strings in a music store. noah buys 2 packs of strings kate buys 2 packs of strings and a music book. the book costs 16$ their total cost is 72$ how much is one pack of strings?

The graph below could be the graph of which exponential function?

This is my question~~ ( r ^ 4 - 2r ^ 3 - 23 r ^ 2 - 4r - 32)÷(r+4) ~~ i must use long division to solve it : / i was wondering if anyone world like to solve it. and if so, share step-by-step explanations! you! ❤

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.