A boy hikes 41km and for the first part of the hike he walks at 4km/h. For the rest of the hike he walks at 5km/h. if it takes him 9 hours to complete the hike calculate how far he walked at each speed.

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b

step-by-step explanation:

a difference is the result of subtraction. while each of these expressions has subtraction in it, a difference will be the result when subtraction is the last operation applied in the order of operations for the expression. this means subtraction must be outside of the parenthesis. only b has this.

-4, -2, 1, 4

step-by-step explanation:

domain = x values

range = y values