Solve the system of equations. 10x+y=−20 y=2x2−4x−16 ( , ) and ( , )

and .

Step-by-step explanation:

We have been given a system of equations. We are asked to solve our given system of equations.

We will use substitution method to solve our given system. From equation (1) we will get,

Substituting this value in equation (1) we will get,

Now we will use quadratic formula to solve for x.

Now to find y values we will substitute in equation (1) as.

Now, we will substitute in equation (1) as.

Therefore, there are two solutions for our given system that are and .

the sum of all the angles in a triangle are equal to 180

so you can add   the 3 given angles together to equal 180:

5y + 2y + 2y = 180

or since all three angles have the same letter, combine the 3 angles to equal 180:

9y = 180

the first one is x^2+2x+2

the second one is x^2+4

the last one is x^2-4x+8