Abiologist found a system of equations to her calculate the growth of bacteria. the functions she found y=2x2−21y=2x2-21 & y=9x−3y=9x-3 part a – explain how would she find the answer to her system of equations without using graphing technology. part b- explain how to solve using graphing technology. how do you know the where the results of the system are?

what

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)