What is the mean of the data set? Enter your answer as a decimal in the box. Round to the nearest tenth.

mean =

2.4

Step-by-step explanation:

1.5+1.5+2+2+2+2.5+3+3.5+4=22

22/9=2.4

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 answer is d. (1.2, -4.7) on edgn

hope this !