Answer:
Step-by-step explanation:
Total sum of age of 12 students = 12*18 = 216;
Total sum of age of 8 students = 8*23 = 184;
Total sum of age of 20 students = 216+184 = 400;
Mean age of all the students = total age / number of students;
= 400/20 = 20 year
Step-by-step explanation:
I believe in would be 15$ off
Hello,
f(x)=x-2
g(x)=x²-7x-9
f(g(x))=f(x²-7x-9)=x²-7x-9-2=x²-7x-11
f(g(-1))=(-1)²-7*(-1)-11=1+7-11=-3
Answer B
⓵
Replace the w with it’s value in the equation :
w⒳ = -2x + 1
-7 = -2x + 1
⓶
Then, you just simplify the right side in order to isolate the x (always take in consideration your priorities of operation) :
-7 = -2x + 1
÷-2 ÷-2
3.5 = x + 1
-1 -1
2.5 = x ☻
Answer:
i think
Step-by-step explanation:
