Solve the following system of equations for x and y. 5x+y = 2
4x-2y = 10
A.(-1,-3)
B.(1. - 3)
C. (1,3)
D.(-1,3)

We can solve this system by elimination to solve for y by multiplying the top equation by 4 and the bottom one by -5.

Now, with what we got for y, we plug it back into one of the original equations. I chose the top one.

Now we have the solution of this system

The solution is A. (-1, -3).

Obtuse angle

Step-by-step explanation:

We already know that it cant be a right angle because right angles measure exactly 90 degrees. We can also tell that is cant be an acute angle because acute angles are less than 90 degrees.

Obtuse angles are greater than 90 degrees, but less than 180 degrees. An angle that is 154 degrees meets these requirements.

Therefore an angle that is 154 degrees is an obtuse angle.