X+6 less than or equal to 10
X+14 greater than or equal to 18
The answer is 42 bc I really do not know trying to get points!
Answer:
x=2.4650
Step-by-step explanation:
I assume that you mean 
so let s use the ln() function

so x = ln(15)/ln(3)
x = 2.4650
Answer
8
Explanation
The absolute value of a negative number turns into a positive
30%*470=141 (So the number of students in 8 grade is 141)