At the end of the day, dodie can clean her hair salon in 15 minutes. ann, who works with her, can clean the salon in 30 minutes. how long would it take them to clean the shop if they work together?

10 minutes

Step-by-step explanation:

Given : Time taken by Dodie to clean her hair salon = 15 minutes

Time taken by Ann to clean the hair salon = 30 minutes

Let t be the time taken by both of them if they work together, then we have

Hence, it would take 10 minutes to clean the salon if both work together.

last option

step-by-step explanation:

given that δdef is right and isoceles,

assuming that side df is the hypotenuse means that de an ef are the other 2 sides that intersect at 90° and are of equal length.

because they are of equal length, we can say that they are congruent

because they intersect at 90°, their slopes must be opposite reciprocals.

only the last option satisfies these conditions.