Use the work shown below to solve. The solution is k =
O -7
04
1. Identify the operation in the equation.
2. Use inverse operations to solve.
. Subtraction property of equality
3
11
2
= k +
2
11
11
11
2
2
- Addition property of equality
13
2
NIC
2 =k+
--
2
15
2
+(-) =k+1+(-)

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

answer: the first one

step-by-step explanation: use a calculator and divide the minutes by the dollars.

a variable is any characteristics, number, or quantity that can be measured or counted. a variable may also be called a data item. hope i !