Working alone, Jamie can mow her lawn in 75 minutes. If Bob helps her, then the two can mow the lawn in 30 minutes. How long does it take Bob to mow the lawn alone? Pls give explanation

20 POINTS + BRAINLIEST

9514 1404 393

  50 minutes

Step-by-step explanation:

"Working together" problems like this usually give you the time per task. However, the rates of getting work done add when expressed as tasks per time.

Let b represent the number of minutes Bob takes to mow the lawn alone. Then the sum of lawns mowed per minute is ...

  Jamie's rate + Bob's rate = "working together" rate

  1/75 + 1/b = 1/30

  1/b = 1/30 -1/75

  1/b = 5/150 -2/150 = 3/150

  1/b = 1/50

  b = 50

It takes Bob 50 minutes to mow the lawn alone.

(1, –1), (16, –4), (36, –6)

step-by-step explanation:

given that the function is

this can also be written as

we have to graph this function and check which list of points lie on the graph

see attachment for graph:

we find that the points lying are (1,-1) (16,-4) and (36,-6)

since square root is there we find that x can only be posiitve but y can be since square root both positive and negative.