Which of the following is equivalent to
2(x2 – x) + 3(x2 – x)?

5x(x-1)

Step-by-step explanation:

2(x2 - x) + 3 (x2 - x)

5x(2 power) - 5x

= 5x(x - 1)

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