Barry needed 16 cubic feet of mulch to put under the playground equipment. each bag of mulch covered 2.1 cubic feet. barry planned on buying 16 bags of mulch. is this a reasonable plan? a. no, it is not reasonable because each bag covers around 2 cubic feet. so in order to cover 16 cubic feet, he would need about 32 bags and he would end up with a little extra. b. no, it is not reasonable because each bag covers around 2 cubic feet. so in order to cover 16 cubic feet, he would only need about 8 bags and he would end up with a little extra. c. yes, it is a reasonable answer because he needs 16 cubic feet of mulch so it is best to get 16 bags of mulch.

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

a) y = -3x +2

b) y = 1/2x -6

these 2 can be combined into one equation.

-3x +2 = .5x -6

8 = 3.5x

x = 8 / 3.5 = 2.2857142857

y = -3 * (8 / 3.5) +2

y = (-24 / 3.5) + 2

y = -4.8571428571

step-by-step explanation: