? Use the cross products property to solve the following proportions. 1. 10/7 = 8/k

2. 9/5 = z/20​

5.6 and 36

Step-by-step explanation:

1. 7x 8 / 10= 5.6

2. 9 x 20 / 5= 36

multiply then divide

step-by-step explanation:

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)