find the discriminant of each quadratic equation then state the number and type of solutions.-7b^2+b-18=-9

y=−9/2x+10

step-by-step explanation:

let's solve for y.

0−9x−2y=−20

step 1: add 9x to both sides.

−9x−2y+9x=−20+9x

−2y=9x−20

step 2: divide both sides by -2.

−2y

−2

=

9x−20

−2

y=

−9

2

x+10

i would say c is the best answer, hope it's right!

good luck! =)

cutie~

the answers are in the images, i received 100% on this assignment. hope this !

m∠a is 90°

m∠b is 40°