Answer:
a = -1
Step-by-step explanation:
-6(3a+4) = 3a-3
-18a-24 = 3a-3
-24+3 = 3a+18a
21a = -21
a = -21 ÷ 21
a = -1
The mode of this set of data is 12
dividing 11.5 by 5 gives you the unit rate, then you just multiply that answer by 2 and you should be okay
