Select the correct answer. A wooden plank of length x is cut into 8 sections such that each section is at most meters long. What is the length of the entire plank in meters?
A.
x ≤ 3.2 meters
B.
x ≤ 20 meters
C.
x ≥ 10.5 meters
D.
x ≥ 20 meters

answer: (-8,4) are the coordinates of a

step-by-step explanation:

let the side of square abcd is x .

thus the area of square abcd is .

now, by the diagram area of triangle ead= 1/2 × ea × ad = 1/2 × ea × x

( because ad is the side of square)

and, according to the question,

the areas of square abcd and right ead are equal.

⇒

⇒ea=2x

thus, ea: ab=2: 1

therefore, point a divides line segment eb into the ratio 2: 1.

⇒ by sectional formula coordinates of a are,

=

=

=(-8, 4)

thus the coordinates of a are (-8,4)

the graph line crosses the x axis at both -6 and -2, so the answer would be the second one.

hello!

some people may think so but i don't. its just a human instinct in my opinion.

have a fantastic day! ~pooch ♥