Answer:
Trang needs to plant 133 shrubs on Friday to finish the job.
Explanation:
With the given data in the problem, we can set up an equation with a variable to solve for the number of shrubs that Trang will need to plant on Friday. Using a model:
M T W Th F Total
84 92 87 104 ? 500
Since we don't know the amount of shrubs on Friday, we can make this our variable 'x'. So, the following equation can be used to find 'x':
84 + 92 + 87 + 104 + x = 500
Combine like terms: 367 + x = 500
Subtract 367 from both sides: 367 + x - 367 = 500 - 367
Solve for 'x': x = 133, which is the number of shrubs that need to be planted on Friday to finish the job.