O 100% Llan measured some of the desks in her classroom. The lengths of the desks in centimeters are shown.
49, 48, 48, 50, 49, 49, 52
Make a line plot of the data. Move the X's to the line plot.
Lengths of Desks
X
X
X
X
х
х
X
X
X
X
х
X
+
48
47
49
52
53
54
50 51
Length (cm)
X

366

step-by-step explanation:

the answer is:

mean: 6

mad: 2.14

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)