Very simple
? – (20 – 4x – 5x2) = 20 – 7x2, so ? = 20 – 7x2 <span>+ (20 – 4x – 5x2)
</span>? = 20 – 7x2 <span>+ (20 – 4x – 5x2)=20-7x²+20-4x-5x²=40-12x²-4x
</span>the answer is <span>C. 40-4x-12x^2</span>
so you just do the slope formula
which y2-y1 over x2-x1 in fraction form
so you would do
(-1 , 8) (5 , -4)
(x1 , y1) (x2 , y2)
-4 - 8 over 5- (-1)
which would give you the fraction 12/6
it can be simplified to 2
so 2 is your slope
hope it help
I think it b not sure tho
3 minutes
10*8*12=960 cubic inches
960/320inches per minute =3
ANSWER
Find out the what is the range of ink cartridges he can buy and still have enough money left over for the reams of paper.
To proof
let us assume that the number of the ink cartridges buy be x.
As given
Carlos monthly office supply budget is $250.
He needs to buy ink cartridges which cost $40 a piece.
He will need to save at least $50 of his budget for reams of paper.
than the inequality is written in the form

x ≤ 5
the range of the ink cartridges he can buy be 0 ≤ x ≤ 5 when he saves
at least $50 of his budget for reams of paper.
Hence proved