3 hours because 39 divided by 13 equals 3 and to check just do 13x3 and it will get you to 39. in conclusion edgar will have to do 3 hours of hard work to get $39
D, Because the equation must be in slope intercept (y=mx+b) and since it is going upwards (all positive nunbers) then the slope would be positive as well. I hope this helps!
Answer:
6 is in ten place and its place value is 60, 3 is in ones place and its place value is 3.
You need to add all of them up then devied by how many there are