Answer:
The student made the first mistake in step 2.
Step-by-step explanation:
Answer: m=23
Step-by-step explanation:
The answer is 60 because 10 x 2 is 20 and 5 x 8 is 40 and add those together to get 60
Answer:
(3 + 4 + 5 + 7 + 10 + 12 + 15)/7 = 8
(3^2 + 4^2 + 5^2 + 7^2 + 10^2 + 12^2 + 15^2)/7 - 8^2 = 17.14285714