Fred Flintstone bought seven boxes to put with his collection of boxes. A week later half the
boxes were ruined in the rain. There are now only 22 boxes left. With how many did he start?
What equation can I use to solve this?

He started with 37.

Step-by-step explanation:

I reasoned

There are 22 left ( a result of being halved ) which means there must have been 44 just before that.  And, he added 7 boxes to get that 44 total. So, what is 7 less than 44?

c. (0.6,-1.4)

step-by-step explanation:

hope this

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