At the karate school, class a has 8 students with an average age of 6 years. class b has 12 students with an average age of 9 years. the classes combine for a group workout.
what is the average age of the combined classes?

average = the sum of the entries / the number of entries

average = 6(8) + 9(12) / 8 + 12

average = 48 +  108 / 20

average = 156 / 20

average = 7.8 years!

Hope that helps!

7.8

Step-by-step explanation: i just took the test :) hope this helps !!

80x^8−68x^6+16^5−20x^4−4x^3+8x^2

hope i'm right lol

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step-by-step explanation: