Bernice estimated that 69% of 242 is 168. Is her estimate reasonable? No, because her calculation should be 60% of 250.
No, because her calculation should be 70% of 250.
Yes, because her calculation should be 60% of 240.
Yes, because her calculation should be 70% of 240.

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

stops on an even number.

its a straight line parallel to the time axis