Combine like terms. (-3^2-7y-+6y+9)

Step-by-step explanation:

To combine like terms we need to remove the parenthesis

Multiply negative inside the second parenthesis

Now combine like terms

The terms that has same variable are like terms

-3y^2 and -4y^2 are like terms so its -7y^2

-7y and -6y are like terms so it becomes -13y

-9 and -9 are like terms so it becomes -18

Answer is

answer: a

step-by-step explanation:

if xy ~ yz therefore xy would be the same length as yz

all the angles opposite to the angle 150 would be 150 and all the angles that are next to 150 are 30 because they equal 180 it you add it up.

step-by-step explanation: