Jeff has two sticker-printing machines. each machine can print 42 stickers per minute. on day 1, only the first machine was used, and it printed 89 stickers. on the following day, the first machine printed for x minutes and the second machine printed for y minutes. which expression shows the total number of stickers printed by both machines during these two days? 131x + 42y 42 + 89x + y 89 + 42x + 42y 89x + 84y

since each machine can do 42 per minute

1st machine = 42x

2nd machine = 42y

and 89 total were done on the first day the equation is

89+42x+42y

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

only 10/60 isn't equivalent

hope this : )