Find the eigenvalues and eigenvectors of the matrix a=1-75-1 -66-2 is a diagonalizable? if yes, find a matrix p such that p- ap is diagonal

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

i need points

step-by-step explanation: