The answer should have been 8.6 that was wrong but it is okay you were close
Answer:
C and D
Step-by-step explanation:
I had this same problem on my quiz
Answer:
To find out the number coming from each school, you need to use the proportion of the school's population out of the population of all three.
Total population = 618 + 378 + 204
= 1,200 students
North Middle school:
= 618/1,200 * 20
= 10 students
Central Middle School:
= 378 / 1,200 * 20
= 6 students
South Middle School:
= 204/1,200 * 20
= 4 students
49=-7k is equivalent to D because when you simplify both of them, you get -7=k
Simplify. Combine like terms
12x - 9x = 3x
7 - 15 = -8
3x - 8 is your answer
hope this helps