Answer:
Step-by-step explanation:
There's the two widths, x.
There's the four lengths, y.
4y+2x=600
Also, A=xy.
x=300-2y
A=y*(300-2y)
dA/dy=0= y*(-2)+(300-2y)
-2y-2y+300=0
y=300/4=150/2=75
x=300-2y=300-150=150
Then the long side is 150ft, the short side is 75ft.
Check to make sure that the sum of the lengths is 600: 300+300=600
And the maximum area is 150*75 ft2
They are both linear then 1 solution
Infinitely many if they are the same line though
y=3-2x
2y=-4x+6 which is y=-2x+3
Infinitely many
7000 = 7 x 1000 = 7 x 10^4
Answer: 7 x 10^4
Answer:
2
Step-by-step explanation:
you divide the number of dollars he spent by how many pounds of feed he bought to get the dollar/pound rate
Answer:
28% decrease
Step-by-step explanation:
If we decrease by 60%, we are keeping 100-60 = 40%
Let x be the original amount
decrease by 60% = keep 40%
.40 x
If we increase by 80%, we are keeping 100+80 = 180%
(.40x) * 180%
.40x * 1.80
.72x
Take .72 times the original amount
100 - .72 = 28
It decreased 28 %