Given that y varies directly with x, use the values specified to write a direct variation equation relating y to x.

x = -19, y = 190

Use your answer to find x when y = -9.

(a)y=-10x

(b)x=0.9

Step-by-step explanation:

If y varies directly with x, we write:

Therefore, a direct variation equation relating y to x is:

(a)y=-10x

(b)When y=-9

Substituting y=-9 into the equation obtained in (a) above

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)

↓↓↓↓↓↓↓↓↓

step-by-step explanation:

this is a parabola.