Answer this math question, college level?

Question

the davey tree company has 80 yards of fencing with which to enclose a rectangular garden. If the garden is x yards long, express the garden's area as function of the length

Answer 1

they gave 80 yrd for perimeter
rectangle P=2(X+W)
80=2(X+W)
X+W=40( divided 2 both side)
subtract X both sides
W=40-X
but the Area of rectangle is A=length*width
answer is A=X*(40-X)
or A=40X-X^2
which X=length, W=width, P=perimeter, A=area
good luck

Answer 2

The total length of fencing is 80, right?
So if the length is x, that means the two sides in the length dimension use ... 2 x yards of fencing.
The other two sides then use 2 y.
Together, all sides add up to 80: 2 x + 2 y = 80
That lets you express y in terms of x: y = 40 - x
Now the area is x * y
x * (40 -x)

Answer 3

#eleven: Multiply the two the numerator and the denominator via the conjugate of the denominator. which ability multiply via the sq. root of 5 minus the squareroot of x. #23: cube the two factors of the equation, which leaves you with: 3x-2=8. remedy from there. #31a: i do no longer undergo in suggestions the thank you to try this. #40: Divide 40 3 via 4, and get a the remainder of three. So the anser is the comparable because it could be if i is raised to the third capability. If I undergo in suggestions wisely, i^3 is -i. #40 8: i don't be conscious of. #40 9: that's (7x6x5x4x3x2x1)/(4x3x2x1). So fairly that's 7x6x5. #fifty 4: the variety is all actual numbers (so that's for all organic log applications that are like ln(x-c) whjere c is a few consistent). For the area, you won't be able to enable the interior a organic log funtion ever be 0 or decrease than 0. subsequently x is larger than 3 is the area. to locate the x-intercept: ln(x-3) =0. e^(ln(x-3))=e^0. x-3=a million. x=4 is the x-intercept.

Answer 4

If you draw a rectangle and write X on the sides that are length, then look at the formula for area of a rectangle you should be able to figure it out.