Ok lets do this like this:
<span>Let x = length
Let y = width
From this we know that area A=xy.
</span><span>Now, perimeter is P=2x+2y
cost would be 3(2x)+2(2y) or 6x +4y=$6,000.00.
From this cost equation we solve for x in terms of y
6x=6000-4y
x=1000-(4y)/6.
</span>now lets substitute this value in the area equation A=xy.
A=(1000-4y/6)y
<span>A=1000y−4<span>y2</span>/6=1000y−2<span>y2</span>/3</span>
differentiate and set to equal zero (0)
<span>1000−(−4y/3)=0</span><span>
Solve for y and obtain y=750ft</span>
Line segment
This is what I found out during class two days ago!
Answer: 80 cm^3.
Step-by-step explanation: V = Bh V = 8 cm ⋅ 10 cm V = 80 cm^3.
Answer: 57x 38= 2166. 71x38= 2698. 31x25= 775 75x47= 3525 63x59=3717
Step-by-step explanation:
Answer: x= - 3; y = -4
Step-by-step explanation:
-x + y = -7
<u>-3x - y = -5</u>
-4x = -12
x= -12 /- 4
x= - 3
-x + y = -7
-(-3) + y = - 7
3 + y = - 7
y = - 7 + 3
y = -4
-x + y = -7
-3 - 4 = - 7
- 7 = - 7