It takes harland 15 minutes to rake all leaves in the front yard. if trudy scatters the leaves while harland rakes, it takes him 20 minutes to rake the leaves. how many minutes does it take trudy to scatter all the leaves?

 Trudy takes 60 minutes to scatter all the leaves.

Step-by-step explanation:

Time taken by Harland to rake all the leaves in the front yard = 15 minutes

Time taken by Trudy scatters the leaves while Harland rakes = 20 minutes

Let time taken by Trudy to scatter all the leaves be x.

Work done by Harland is given by

Work done by both of them is given by

According to question,

Hence, Trudy takes 60 minutes to scatter all the leaves.

dont know

step-by-step explanation:

graph b

step-by-step explanation:

one solution- graph a (clear intercepting point.)

no solution- graph b (they're parallel, there will never be a point of interception.)

infinite solutions- graph c (all points intercept.)