Robert sold 6 more magazine subscribtions the second week than he sold the first week. He sold twice as many the third week as he sold the first. If he sold 94 magazine subscription in all, how many did he sell the second week?

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.