What is the total cost of order number four (12.95) if the customer received 10% off and paid a 15% gratuity and 4.5% sales tax?

answerthe vertex form

step-by-step explanation:

step-by-step explanation:

we have

using a graphing tool

see the attached figure

this is a quadratic equation (vertical parabola) open up

the vertex is a > vertex

the domain of the function is all real > interval (-∞,∞)

the range of the function is the > [-6.125,∞)

the function has two x->   and

the function is increasing over the > (0.25,∞)

the function is decreasing over the > (-∞,0.25)

10 - 8 = -2

  8 - 6 = -2

etc, so -2 is the common difference

step-by-step explanation: