5/8 - 1/7 And 0.6 - 1.4 order these quantities from least to greatest

Define multiplicative inverse. give an example of a number and its multiplicative inverse.

Jonathan can type 20 documents in 40 minutes ,and susan can type it in 30 minutes and jack can type it in 24 minutes working together ,how much time will it is take them type the same document

Atrain leaves little? rock, arkansas, and travels north at 90 kilometers per hour. another train leaves at the same time and travels south at 80 kilometers per hour. how long will it take before they are 680 kilometers? apart?