M=-4
The number with x is always going to be the slope
Y-intecept=9
Take 2.60 and multiply it by .15
2.60
x.15
_____
1300
260
_____
which equals £39.00
Answer:
I think it might be C. I am not sure.
15-3(4-2x)-7(x-8) = 15 - 12 + 6x -7x +56 = -x +59
15-3(4-2x)-7(x-8) = - x + 59
Let x be the height of the box and y be the length of one side of the base then:-
V = xy^2 = 108
x = 108/y^2
Surface area = y^2 + 4xy
S = y^2 + 4y* 108/y^2
S = y^2 + 432/y
Finding the derivative:-
dS/dy = 2y - 432/y^2 = 0
2y^3 = 432
y^3 = 216
y = 6
Check if this gives a minimum value:-
second derivative = 2 + 864/y^3 which is positive so minimum.
V = xy^2 = 108
36y = 108
y = 3
Answer :- dimensions of the box is 3*6*6 metres
