1. Select all expressions that are equivalent to the following calculation.
Add 43 and 25, and then multiply by 8.
(25 + 43) × 8
43 + 25 × 8
8 × 43 + 25
8 × (43 + 25)
43 + (25 × 8)

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.