Alexia started babysitting when she was in high school. she has built a reputation for herself and has become popular among the neighborhood parents. alexia charges $10/h and gets a $5 automatic tip. alexia needs $75 to buy a present for her mother. she wants to find out the minimum number of hours she needs to babysit at one job to get the money she needs. (5 points) a. write an inequality to show how to solve this problem. identify what the variable is and what it represents. b. solve the inequality to find out the minimum number of hours alexia needs to babysit. show your work.

if the eqn of the parabola is f(x) = (x-4)(x+2), we need to mult. this out to find the coordinates of the vertex.

then f(x) = x^2 + 2x - 4x - 8, and f(x) = x^2 - 2x - 8.

one way in which you can find the vertex is to calculate x = -b / (2a).   here, that comes to

        )

x = = 1.   f(1) = 1^2 - 2(1) - 8 = - 9.   vertex is at (1, -9).

        2(1) 

find another point on the curve:   let x=0, for which y=-8.   then (0, -8) is on the curve.   plot the vertex and this point and draw a smooth parabola thru both.

hope this

okay wait before i answer, is this for your points on a graph?