Aubrey’s dinner costs $85.she tips the waitstaff 30% for excellent service.

how much does aubrey tip the waitstaff?

She tips the waiter 25.5 dollar.

Step-by-step explanation:

If the dinner cost 85 you multiply by .30 and you get 25.5. If you wanna find out whole cost after subtract 25.5 from 85.

the last choice

step-by-step explanation:

for this case we have by definition, if two lines are perpendicular, then the product of their slopes is -1.

then, given the following line:

so,

we are looking for m_ {2}:

then, the line is given by:

we find "b" replacing the given point:

finally, the equation is:

option c