Alice’s journey to work every morning involves getting a bus and then walking for 20 minutes to get to the office. Yesterday she missed the bus and had to catch the next one. She then walked to her office in three quarters of the normal amount of time. She arrived at work 15 minutes later than usual. Which of the following could explain the difference in Alice’s arrival time?

step-by-step explanation:

this can be solved first with pythagorean theorem, which tells us to square both legs of the triangle and sum it. this will be equal to the square of the hypotenuse.

the hypotenuse is the side "opposite" the 90 degree angle, which is x.

so we can write using pythagorean theorem,

simplifying:

to further simplify this radical, we need to use the property  

thus

there is no following? ! lol