What does a ratio of 2: 2: 1 mean? a. 2/4, 2/5, 1/4 b. 2/6, 2/6, 1/6 c. 2/5, 2/5, 1/5 d. 2/4, 2/4, 1/4

78.59 is the mean

step-by-step explanation:

i think the answer would be c

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)