(+5)+(-5)+(-10)+(+20) find the sum​

You decide instead to take the train there. the train will take 135 minutes. convert this into hours and minutes.

Ametal rod needs to be 9 feet and 5.5 inches in length. the sections of the poles being used are each 1 foot and 10.5 inches long. how many 1ft 10.5in sections would be needed to complete the 9ft 5.5in metal rod? and how many inches of material will be left?

What is the slope of the line shown below?