Answer:
A(x) = x(200-x)
Step-by-step explanation:
400 feet of fencing to enclose a rectangular dog exercise pen means the perimeter of rectangle is 400 feet
If x is length and y is breadth. Perimeter is given by :
P = 2(x+y)
400 = 2(x+y)
⇒ (x+y) = 200 .....(1)
y = 200-x
Area of a rectangle is given by :
A = xy
A(x) = x(200-x)
Hence, the area as a function of length of rectangle is x(200-x).
Answer:
A
Step-by-step explanation:
Formula for circumference is 2πr=C
80/2 gives you the radius which is 40.
40×2=80
pi=3.14
80×3.14=251.2 which is 251 or A
Y = 2x + 6
x + y = 51...x = 51 - y
x + 2x + 6 = 51
3x = 51 - 6
3x = 45
x = 15
y = 2x + 6
y = 2(15) + 6
y = 30 + 6
y = 36
answer is : first answer choice...and ur numbers are 15 and 36
Answer:
x=29/2
Step-by-step explanation: